what are the valence electrons and why are they important?
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Valence electrons are the electrons in the outermost energy level of an atom — in the energy level that is farthest away from the nucleus. When chemists study chemical reactions, they study the transfer or sharing of electrons. ... Those valence electrons are the ones lost, gained, or shared.
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Valence is an older term that describes how many other atoms an atom can bond with. Valence electrons are the number of outer shell electrons an atom has.
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Atoms like sodium, with only one or two electrons in a valence shell that needs eight electrons, are most likely to give up their valence electrons to achieve a stable state. All these atoms need is another atom that can attract their electrons!
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Oxygen has six electrons in its outer shell, so it has 6 valence electrons. However, the valence of oxygen is 2 because it only has to make 2 covalent bonds, or gain 2 electrons, to achieve stable octet configuration of a noble gas.
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Valence electrons are those electrons farthest away from the nucleus of an atom. They are important in chemistry because they are responsible for determining the chemical behavior of an atom. ... There are a total of 5 (3+2) electrons in the fifth energy level. The chemistry of life is based on carbon.
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Most transition metals have 2 valence electrons. Valence electrons are the sum total of all the electrons in the highest energy level (principal quantum number n). Most transition metals have an electron configuration that is ns2(n−1)d , so those ns2 electrons are the valence electrons. For example.
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Recall that the valence electrons of an atom are the electrons located in the highest occupied principal energy level. Valence electrons are primarily responsible for the chemical properties of elements. ... The eight valence electrons, a full outer s and p sublevel, give the noble gases their special stability.
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Iodine has seven valence electrons. Valence electrons of an atom are located in the outermost shell of the atom and participate in bonding. If an...
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Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond contribute one valence electron in order to form a shared pair. The ground state of an atom is the lowest energy state of the atom.
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Answer and Explanation: Aluminium has 3 valence electrons. Valence electrons are located in the outermost shell of an element. On the periodic table, the group number of an...
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What is the particular significance of valence electrons? Valence electrons form chemical bonds between atoms by being transferred or shared. How does an atom become a positive or a negative ion? An atom becomes a positive ion by losing an election; it becomes a negative ion by gaining an electron.
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Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
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Atoms of elements in this group have four valence electrons.
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For a main group element, the valence electrons are defined as those electrons residing in the electronic shell of highest principal quantum number n. Thus, the number of valence electrons that it may have depends on the electron configuration in a simple way.
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The electrons that occupy the outer most shell of an atom are called valence electrons. They are important because they determine how an atom will react.
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Atomic number is the total number of electrons. The valence electrons are only those in the outer shell.
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Answer and Explanation: Aluminium has 3 valence electrons. Valence electrons are located in the outermost shell of an element.