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Chemistry, 29.01.2020 15:48 mf7252001

Which electron configuration represents an atom of sodium and why?
a. 1s2 2s2 2p6 3s1
b.1s1 2s2 2p6 3s2
c. 1s2 2p6 3s2 3p1
d. 1s2 2s2 2p6 4s1

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Which electron configuration represents an atom of sodium and why?
a. 1s2 2s2 2p6 3s1
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