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What is the valence of sodium?

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Quick Answer

The valence of sodium is one. Sodium has a valence of one because it only has one electron present on its outermost shell. The outermost shell of an atom is also known as its valence shell.

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Full Answer

Sodium has an atomic number of 11, meaning that 11 electrons orbit around the nucleus of the atom. The innermost shell holds a maximum of two electrons, while the second shell holds a maximum of 8 electrons. This means that 10 electrons occupy the first two shells, so that only one is left in the valence shell. Therefore, the valence of sodium is one.

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