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7s1 because the definition of valence electrons are the outermost s and p electrons therefore in this case there is only an outermost s electron and therefore the answer is 7s1. NOTE:IT DOES NOT INCLUDE THE D AND THE F ELECTRONS!!!!

Other valence configuration examples include;

Nitrogen : 2s2 2p3
Chlorine : 3s2 2p5
Zinc: 4s2

Bromine: 4s2 4p5

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15y ago

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