How many valence electrons do hydrogen and helium want to have May 24, 2024 · Helium atoms only need 2 valence electrons to have a filled outermost energy level because helium is in the first period of the periodic table and its outermost energy level can only hold a Why do atoms want exactly 8 valence electrons, and why is it impossible to have 9 valence electrons? It's not impossible, and not all elements want exactly 8 electrons in their outer shell. Valence electrons are the electrons in the outermost shell, or energy level, of an atom. 6 and more. Dec 13, 2020 · Unlike most atoms, hydrogen does not need to obtain eight electrons but rather only needs two electrons to fill its valence shell and achieve stability, which is similar to the noble gas configuration of helium. Most atoms need 8 valence electrons to have a complete outer shell and achieve stability, according to the octet rule. This rule suggests that atoms are most stable when their valence shell is full, typically with eight electrons. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. This means it has two electrons in s orbitals with a principal quantum number of 1. To know its valence electron, read the article. ) Helium, who is found in this group, only has two valence electrons. May 25, 2023 · If you want to find the valence electrons of hydrogen from its electron configuration, then you should know its electron configuration first. Exceptions to this include hydrogen and helium, which only require two electrons, and certain elements like boron, which can be stable with fewer than eight electrons. Therefore, the valence electrons of nitrogen are five. Nov 12, 2023 · Hydrogen needs 1 valence electron to be full while helium already has 2 valence electrons, making its shell full. 8 valence electrons are needed on the 2nd and 3rd valence shells for any molecule to become stable. How many electrons does helium have in its outer shell? Helium is slightly different than the other noble gas elements. Since helium atoms only have two electrons and the outermost energy level is the first energy level, there can only be two valence electrons. We can write the configuration of oxygen's valence electrons as 2s²2p⁴. How many valence electrons does a sodium, silicon, beryllium, and oxygen atom have? [sodium = 1; silicon = 4; beryllium = 2; oxygen = 6] What is the relation between the number of valence electrons in atoms of an element and the element's placement in the periodic table? Give examples. , Three pairs of electrons are shared in a and more. Feb 16, 2023 · The octet rule states that atoms seek to have eight electrons in their outermost shell for stability. Additionally, some atoms can exceed eight valence electrons due to available d orbitals, particularly those in the third period and beyond. To conclude, a hydrogen atom need to gain one additional electron to achieve a stable configuration similar to helium. How many are needed for stable configurations? The atoms of other elements can lose, gain, or even share electrons. (p. So what does that mean about their valence electrons? You The atomic number of sulfur is 16 and its symbol is 'S'. This is in accordance with the octet rule, which states that Electrons that inhabit a partly-filled shell are called valence electrons. Jun 1, 2022 · Atoms strive to have eight valence electrons to be stable, following the octet rule. Now let’s see how you can easily find the valence electrons of Helium atom (He). The octet rule refers to the tendency atoms usually have to have exactly eight electrons in their valence shells. This is based on how many electrons a given element has filling its electron clouds. How many electrons does hydrogen need to gain to fill its valence shell? a. Helium, who is found in this group, only has two valence electrons. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Helium (He) is located in Group 18, which is known as the noble gases. Thus, only the noble gasses are “born” to be stable. Elements in other groups have partially filled valence shells and gain or lose electrons to achieve a stable electron configuration. For complicated reasons related to the energy levels and angular momentum of bigger atoms, essentially all other elements can be described based on having 8 electrons in their outermost shell. Group 1 elements have just one valence electron and group 18 elements have eight, except for helium, which has only two electrons total. To determine the number of valence electrons in any type of atom, find the element on the periodic table, and count across that row from the left side Helium is the 2nd element of the periodic table so its atomic number is 2. Jan 14, 2021 · The atomic number of Hydrogen (H) is 1 that means it has only one electron. Because helium has two valence electrons, it too is stable and seldom bonds with other atoms. Therefore, the valence electrons of oxygen are six. For example, the The Octet Rule Our discussion of valence electron configurations leads us to one of the cardinal tenets of chemical bonding, the octet rule. Mar 3, 2021 · Learn about valence electrons. Nov 27, 2023 · The question pertains to the number of valence electrons that most atoms need to have a complete outer shell and be chemically stable, or "happy". sodium c. Thus, group number is a good predictor of how reactive each element will be: Many of the physical and chemical properties of elements can be correlated to their unique electron configurations. Study with Quizlet and memorize flashcards containing terms like According to the octet rule most elements need __ valence electrons to be stable. However many electrons there are in the outermost electron cloud that are available for sharing is equivalent to the valence number. Hydrogen and helium are the only elements that have a full electron shell with exactly two electrons. All other atoms must gain, lose, or share electrons to be more like a noble gas. Hydrogen is an exception because it only needs to gain 1 electron to become stable and can only have at most two valence electrons. Note: For future use, bookmark this Periodic table or visit “PeriodicTableGuide. Hydrogen and helium are in the first row, or period, on the periodic table. ) Based on the location of nitrogen (N) on the periodic table, how many additional electrons does a nitrogen atom need in its valence shell to satisfy the octet rule when it forms bonds? Bonding with Helium Helium atoms have two electrons and two protons. So, the valence electrons of helium are two. The Duet Rule applies to hydrogen and helium only, but the abundance of hydrogen is so prominent that the rule deserves its own article. The valence electrons determine the element’s properties and participate in forming bonds. When the outermost energy level is any other level beyond the first energy level, it may contain up to eight valence electrons. Beryllium has two valence electrons. Learn the electron configuration of hydrogen and orbital diagram, atomic structure with different configuration model, valency with easy explanations. Stable atoms tend to have 8 valence electrons, like the noble gasses. Complete Solution : Apr 24, 2017 · Number of Electrons The number of electrons in each energy level is displayed on the periodic table. Use this for reference with a periodic table. Oct 21, 2016 · Helium has two valence electrons located in its outermost shell, represented by its electron configuration 1s2. Electronic Configuration: The electron configuration of helium is 1s², meaning it has two electrons in its first and only shell. The number 1-8 indicates the number of valence electrons for some atom. How does the bonding within lead help to explain this property? Metallic bonds involve many valence electrons shared by many atoms, so the bonds can move around as the metal is pounded. Hydrogen only has one electron in its lowest energy level. View rotating Bohr models for all 118 elements. This is a very stable arrangement, and helium in consequence is an inert gas with few chemical properties. The octet rule states that atoms become especially stable when their valence shells gain a full complement of valence electrons. e by using Aufbau principle. When atoms have fewer than eight, they tend to react with other atoms to form more stable compounds and surround themselves with eight electrons. Valence electrons are involved in the formation of chemical bonds between atoms, so it is helpful for chemists to know how many valence electrons each type of atom has. Since helium has two electrons filling this orbital, it has a completely filled outermost energy level. In carbon An exception to an octet of electrons is in the case of the first noble gas, helium, which only has two valence electrons. How many protons, neutrons, and electrons does the element have? a. The following is a list of total electrons, electrons by shell, and valence electrons for the first 10 elements. If it needs to gain electrons as part of a bonding sequence, it will need to form a new valence shell further away from the nucleus than the old one. Hydrogen has 1 electron in the first shell (so one valence electron). However, there are exceptions to this rule, especially for elements with fewer than 20 electrons. This would fill its outermost energy level (\ce {1s} 1s) and give it the same electron configuration as helium. Study with Quizlet and memorize flashcards containing terms like How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. Compounds with more than an octet of electrons around an atom are called expanded-valence molecules. According to the octet rule, the majority of atoms strive to have eight electrons in their valence shell, with the exception of hydrogen and helium, which are stable with two electrons in their outer shell. Eight electrons are needed to achieve the stable configuration. com” The Duet Rule applies to hydrogen and helium only, but the abundance of hydrogen is so prominent that the rule deserves its own article. An exception to an octet of electrons is in the case of the first noble gas, helium, which only has two valence electrons. How many electrons are in the valence shell of noble gases? Eight electrons, a full outer shell The atoms of elements can lose, gain, or even share _______. Elements who have 8 valence electrons on their own (without bonding to another atom/element) are called the noble gases (group 18. . Helium is tiny and can only hold on to two outer electrons. Oct 19, 2023 · Valence electrons are those electrons that reside in the outermost shell surrounding an atomic nucleus. Aug 22, 2020 · Why Helium has only need 2 valence electrons? Helium atoms have two electrons and two protons. An atom may give, take, or Mar 29, 2020 · This usually means sharing electrons to achieve an octet (8 electrons) like a noble gas, except for hydrogen which needs only two electrons to become stable like the noble gas helium, which has only two valence electrons. This is because of how many electrons they have. Hydrogen aims to How many valence electrons do hydrogen and helium need to be full? Elements typically strive to have a full outer shell of electrons, which usually means having 8 electrons in their outermost energy level. That’s why they don’t follow the octet rule (8 valence electrons): their outermost energy level can only hold up to 2 valence electrons. However, there are exceptions to this rule, such as hydrogen and helium, which only need 2 valence electrons to be stable. Jun 2, 2024 · The octet rule states that atoms tend to prefer having 8 electrons in their valence shell in order to possess an electronic configuration similar to the closest noble gas. In any atom with two or more electrons, the repulsion between the Study with Quizlet and memorize flashcards containing terms like Why are the elements in group 1A through 8A called representative elements?, What do all the elements in a group have in common?, How many valence electrons do group 1A elements have? Group 2A elements? and more. Fluorine participates in the formation of bonds through its valence electrons. In fact, the number of valence electrons goes up by one for each step across a period, until the last element is reached. nitrogen, How many more electrons do oxygen atoms need to complete their valence shell? Select one: a. The n = 1 valence shell can hold a maximum of two electrons, and thus hydrogen aims to either share or gain one electron to achieve a filled valence shell. An atom bonds to have eight valence electrons to become stable. the number of additional electrons needed to form an octet c. Any element in group 18 has Two of them are core electrons and the remaining 3 are valence electrons. The last shell of sulfur has six electrons. It consists of two parts: Chemical symbol Valence electrons Since all elements in the same group share the same pattern in their electron configuration, this means that they have the same number of valence electrons. So, it's important to be able to identify how many valence electrons atoms of different elements have. Explanation of how to count valence electrons of an element using both the electron configuration and/or the position of the element on the periodic table. If you don’t want to read the texts, then you can also watch this video. The valence shell of hydrogen and helium is the first electron shell, which holds a maximum of two electrons. Apr 24, 2017 · Number of Electrons The number of electrons in each energy level is displayed on the periodic table. 2 Hydrogen atoms comes close. It is a noble gas and is ths relatively inert. Atoms in the same column (group) in the periodic table have the same number of valence electrons. Study with Quizlet and memorize flashcards containing terms like How many valence electrons do all atoms want to have? Are there any exceptions?, Explain how you use the Periodic table to determine the number of valence electrons, Electron and more. Does hydrogen have a full valence shell? Group 18 elements (helium, neon, and argon are shown) have a full outer, or valence, shell. Understanding how many valence electrons in helium contribute to its inert nature helps us appreciate its applications, especially in fields where reactivity with the environment is undesirable, as seen in weather balloons that utilize helium's stable properties. b. According to the number of electrons in the atoms are arranged in the shells and the last shell of the atom is the valence shell and the electrons in that shell are valence electrons. barium e. Now there are many methods to write the electron configurations, but here I will show you the easiest method, i. As a result, helium is lighter than air, explaining why a helium balloon floats up into the air unless weighted down. 17 protons, 35 neutrons, and 17 electrons b. The valence orbitals of hydrogen (and helium) have a principle quantum number of 1, and so there is only one orbital available, the 1s. The electron configuration of oxygen shows that the last shell of oxygen has six electrons. The first four or five elements usually bond to attain the electron configuration of helium, which has only two valence electrons, and transition metals often share more than just their valence electrons. Therefore, the first energy level can have a total of two electrons. Now we will learn how to determine the valence electrons of hydrogen. The lowest energy level is filled with its maximum number of electrons. This rule is critical in understanding the Select one: a. Examples include hydrogen (H), lithium (Li), and sodium (Na). carbon, Describe two ways that an ion forms from an atom. Describe covalent bonds. 1 c. 17 protons, 18 neutrons, and 17 electrons c. How many valence electrons does boron have? Recognize that the second principal energy level consists of both the 2 s and the 2 p sublevels, and so the answer is three. , Two representative elements are in the same period of the periodic table. Study with Quizlet and memorize flashcards containing terms like Why do atoms form chemical bonds?, Why does the octet rule not always refer to a stable arrangement?, Which of the three bond types in distinctly different from the other two? Why? and more. Nov 1, 2025 · Atoms of group 18 elements have eight valence electrons (or two in the case of helium). A full valence shell is the most stable electron configuration. The valence electrons, electrons in the outermost shell, are the determining factor for the unique chemistry of the element. Carbon participates in the formation of bonds through valence electrons. May 7, 2025 · Oxygen ends up with 8 valence electrons, each hydrogen has 2 (duet rule) Covalent bonds are most common between nonmetals and are governed by the desire of all involved atoms to reach stable electron configurations. nitrogen b. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound. lithium c. For instance, atoms from Group 14, like Carbon, have four electrons in their outermost shell and require four more electrons to complete their octet. This gives both atoms in the covalent bond a full valence shell of 8 electrons. Fortunately, we can use the periodic table to quickly determine the number of valence electrons for main group elements. Sep 2, 2019 · Electron Sharing By sharing their valence electrons, both hydrogen atoms now have two electrons in their respective valence shells. For example, in above, Helium (He) and Neon (Ne) have outer valence shells that are completely filled, so neither has a May 22, 2024 · However, the exception is Helium, the first noble gas, which only has two valence electrons. How would the model change as the atom forms bonds? The third shell would be empty so that the eight electrons in the second level would be outermost after the atom loses one electron. Therefore it’s easy to group them together, like this: Notice how the electrons are filled when drawing Lewis symbols. However, there are some exceptions to this rule. For example, hydrogen and helium only need 2 electrons to fill their valence shell. Neon, for example, has eight electrons in its valence shell, and for this reason it does not bond easily with other atoms. 154) Mar 8, 2023 · How Do Valence Electrons Affect the Chemical Properties of an Element? The number of valence electrons in an atom affects the chemical properties of the element. Get a free HD image of the Periodic Table. May 31, 2024 · Atoms become stable when they have a full outer electron shell, which typically means having 8 valence electrons (except for hydrogen and helium, which are stable with 2 valence electrons). The diagram shows an electron shell model of a sodium atom. Sep 25, 2023 · The octet rule states that all atoms, with the exception of hydrogen and helium, need 8 electrons in a full valence shell. [1] Thus, the number of valence electrons that it may have depends on the electron configuration in a simple way. 8 The electron configuration of helium shows that there are a total of two electrons in the last shell of helium. One model to explain their existence uses one or more d orbitals in bonding in addition to the valence ns and np orbitals. Elements in the same column of the Periodic Table have similar chemical properties. Sep 1, 2025 · Q: Based on both periodic tables above (Figures above and above), what are examples of elements that have just one valence electron? What are examples of elements that have eight valence electrons? How many valence electrons does oxygen (O) have? A: Any element in group 1 has just one valence electron. In carbon The valence electrons are the electrons in the outermost orbit of atoms in a main group element (i. The electrons that determine valence – how an atom reacts chemically – are those with the highest energy. Oct 8, 2024 · Study with Quizlet and memorize flashcards containing terms like What are valence electrons?, How many valence electrons do most atoms need to be "happy"?, Which two elements only need two valence electrons to be "happy"? and more. Terms in this set (5) How many electrons does hydrogen need in order to have a full shell of valence electrons? two How do valence electrons impact the type of bonds an atom makes? An atom wants a full outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs. The total number of electrons in the last shell after the electron configuration of nitrogen is called the valence electrons of nitrogen. Study with Quizlet and memorize flashcards containing terms like How many electrons does hydrogen need in order to have a full shell of valence electrons?, How do valence electrons impact the type of bonds an atom makes?, Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. Atoms are unstable unless they have 8 valence electrons. Based on the location of nitrogen (N) on the periodic table, how many additional electrons does a nitrogen atom need in its valence shell to satisfy the octet rule when it forms bonds? Dec 4, 2024 · Hydrogen and Helium: These elements are exceptions because they only need 2 electrons to fill their valence shell due to having a much smaller shell (1s orbital). , s-block and p-block elements). Helium and hydrogen both do not follow the octet rule, but instead have two electrons in the valence shell to be stable. The valence shell is the outermost electron shell of an atom, and it is the most energetically stable when it is filled with 8 electrons. Such species are known for only atoms in period 3 or below, which contain nd subshells in their valence shell. 4 d. Thus, helium does not readily form bonds with other elements due to its filled electron shell. For a main-group element, the valence electrons are defined as those electrons residing in the electronic shell of highest principal quantum number n. Study with Quizlet and memorize flashcards containing terms like What is the term associated with the outermost energy shell of an atom (and its electrons)?, How many electrons do Hydrogen (H) and Helium (He) need to make full their outermost electron shell?, How many electrons do all other elements, besides Hydrogen (H) and Helium (He), need to make full their outermost electron shell? and more. This is often referred to as the "octet rule". The valence electrons may participate in bonding through sharing with other atoms, to make three bonds. 5 d. phosphorous d. These elements already have a full outer energy level, so they are very stable. Feb 24, 2022 · Core electrons are also referred as non-valence electrons. The valence electrons determine the properties of the element and participate in the formation of bonds. This is known as the octet rule. Atoms of which element form bonds without satisfying the octet rule? Hydrogen - (It only needs 2 total valence electrons because it with then "look" like Helium. The mass number is the sum of protons and neutrons in the atom (35-17=18). The last (and only) level of helium's electronic configuration is $\mathrm {1s^2}$, and therefore $\ce {He}$ has 2 valence electrons. In summary, helium does not need to acquire any additional valence electrons because it already has its outermost shell filled with its existing two electrons. May 19, 2024 · This table of element valences includes the maximum valence and most common valence values in chemistry. May 25, 2023 · + How can you find these valence electrons? Let’s discuss this in short. The number of valence electrons determines most of an atom's chemical behaviors. 18 protons, 18 neutrons, and 17 electrons b. , Hydrogen needs __ electrons in its valence shell to be stable. The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons and thus the electron configuration of a noble gas. hydrogen d. The valence electrons are the total number of electrons in the last orbit (shell). These May 18, 2020 · Helium atoms, on the other hand, have two protons and two electrons in the lowest energy level. 17 protons, 17 neutrons, and 18 electrons d. Dec 21, 2023 · To understand why, we need to look at the periodic table. The number of elements in each row shows how many electrons it takes to fill each level. Jun 2, 2013 · Helium has two electrons in total, and according to the aufbau principle, it adopts the electronic configuration $\mathrm {1s^2}$. Two hydrogen atoms can form covalent bond because they only have two electrons in the molecular orbital which fills up only the bonding orbital, therefore creating a bond. Two different elements have similar chemical properties when they have the same number of valence electrons in their outermost energy level. Dec 25, 2023 · The reason why hydrogen and helium only need two valence electrons to achieve stability is that their valence shell, which is their first and only electron shell, can only hold a maximum of two electrons. Elements with fewer than four valence electrons tend to form ionic bonds, while elements with more than four valence electrons tend to form covalent bonds. There is only one shell of electrons, the valence shell of two electrons. Apr 5, 2018 · Atoms join together with chemical bonds by sharing electrons. Aug 11, 2023 · Atoms become stable when they have a full outer electron shell, which typically means having 8 valence electrons (except for hydrogen and helium, which are stable with 2 valence electrons). and more. There are two elements that only want two valence electrons to be happy: hydrogen and helium. carbon b. Hydrogen follows the 'duet rule,' needing just 2 electrons in total. The atomic number of hydrogen is 2, so there are two electrons in helium. From the electron configuration of neutral phosphorus atoms in Example 4 7 1, how many valence electrons and how many core electrons does a neutral phosphorus atom have? Nov 10, 2023 · Most atoms want to have 8 electrons in their valence shell. Bohr diagrams indicate how many electrons fill each principal shell. It is in period 4 and family 15 (5A or the Nitrogen family). Valence Electrons Defined: Valence electrons are the electrons in the outermost shell of an atom that can participate in chemical bonding Study with Quizlet and memorize flashcards containing terms like They have the same valence electron configuration (s²p⁵), The energy level of an atom's valence electrons equals its period number, All nobel gases have eight valence electrons, except for Helium, which has two and more. However, valence electrons can be easily identified by arranging electrons according to the Bohr principle. Jul 26, 2024 · Hydrogen (and helium) both have the first energy level as their valence energy level. This shell configuration is unique to hydrogen and helium, as they are the only two elements in the first row of the periodic table and thus only have one electron shell. How many valence electrons do most atoms need to have a complete outer shell and be satisfied? Study with Quizlet and memorize flashcards containing terms like What are valence electrons and how can we determine the number of valence electrons for any of the main group elements?, How many valence electrons does helium have?, What is an octet? and more. e. How does helium only have 2 valence electrons? Helium atoms have two Nov 12, 2021 · Hydrogen needs one additional electron to have a full shell of valence electrons. Group 18 elements (helium, neon, and argon are shown in Figure 2) have a full outer, or valence, shell. Since each orbital can contain up to two electrons (of opposite spin), hydrogen can have 2 electrons in its Lewis Dot Structure. Nov 9, 2023 · Most atoms want to have 8 valence electrons, except for hydrogen and helium which want 2 valence electrons. Nonmetal atoms share electrons by overlapping half-filled orbitals from their valence shells. the number of valence electrons We can predict the number of bonds an atom can form by counting the number of electrons needed to form an octet, or the number of valence electrons in the atom. Find the full electronic configuration and valence electrons of any periodic element using this electron configuration calculator. 2 c. 2 b. Because each valence shell is now filled, this arrangement is more stable than when the two atoms are separate. Neon, which has 8 valence electrons, is the nearest neighbor of carbon, nitrogen and oxygen, so they will end up with 8 electrons, while helium, which as 2 valence electrons, is the nearest neighbor of hydrogen, so it ends up with 2. The type of chemical bond that involves the transfer of electrons between atoms is a (n) _ bond. Therefore, a helium atom has two protons, two neutrons and two electrons. How do valence electrons impact the type of bonds an atom makes? A large number of valence electrons means the atom will share electrons; a small number of valence electrons leads to transferring from one atom to another Sep 1, 2024 · Access detailed info on all elements: atomic mass, electron configurations, charges, and more. Hydrogen and helium are exceptions because they only need two electrons, adhering to the 'duet rule' due to their first shell's limitations, with hydrogen having a configuration of 1s¹ and helium 1s². 1 b. Which statement correctly describes the atoms of the two elements?, Helium is in group 18 of the periodic Study with Quizlet and memorize flashcards containing terms like What is a valence electron?, To which group in the periodic table does each of the following elements belong? How many valence electrons do atoms of each element have? a. In comparison, the group 1 elements, including hydrogen (H), lithium (Li), and sodium (Na), all have one electron in their outermost shells. However, there are exceptions, such as hydrogen and helium, which only need 2 valence electrons. Jan 14, 2021 · The atomic number of Helium (He) is 2 that means it has two electrons. The last shell of nitrogen has five electrons. Occur when 2 nonmetal atoms share electrons to achieve a stable configuration of the noble gases. An atom may give, take, or Nov 1, 2025 · A: Helium atoms have just two protons, two neutrons, and two electrons, so they have less mass than any other atoms except hydrogen. This is because they do not have p-orbitals, and just need the s2 orbital filled. A stable element typically has 8 valence electrons, which is known as a full or complete outer shell. The energy of atomic orbitals increases as the principal quantum number, n, increases. These electrons fill the first energy level, making helium stable and chemically inert, characteristic of noble gases. Helium has 2 valence electrons because there are 2 electrons present in the outermost shell of the Helium (He) atom. Complete Solution : Jul 30, 2024 · The electrons in the energy level farthest from the nucleus are called valence electrons. Hydrogen and all the other elements in the first group of the period table have a valence of one. This primarily affects the element hydrogen, which forms stable compounds by achieving two valence electrons. Get the definition and a periodic table showing the number of valence electrons for each element. For hydrogen and helium, unlike most other elements, a full valence shell consists of two electrons rather than eight. An uncombined hydrogen atom consists of a nucleus and one valence electron in the 1s orbital. For example, hydrogen and helium are stable with 2 electrons in their outermost energy level. Feb 24, 2017 · The 1s orbital is the closest to the nucleus and can hold a maximum of two electrons. Recall, we can use the periodic table to rank the energy levels of various orbitals. For most of the transition and inner transition elements, the valence electrons are primarily found in the shells outside of the noble gas core. bromine f. How many valence electrons do most atoms need to have a complete outer shell and be happy? Study with Quizlet and memorize flashcards containing terms like Which part of the atom is responsible for chemical bonding?, What are valence electrons (be specific)?, How many valence electrons do most atoms need to have a complete outer shell and be happy? and more. Therefore, the valence electrons of sulfur are six. Valence electrons are of crucial importance because they lend deep insight into an element’s chemical properties: whether it is electronegative or electropositive in nature, or they indicate the bond order of a chemical compound – the number of bonds that can be formed between two atoms. araos qymyzc mdaxo cffp ophe zzmsefz mce gka keig fhkwzh dvzit astu xyqvbw agzvni ceusp