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Question

Which one of the following elements exhibit maximum number of valence electrons?

A
Na
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B
Al
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C
Si
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D
P
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Solution

The correct option is D P
Electronic configuration of Na: 2, 8,1
Al: 2,8,3 Si: 2,8,4 and P: 2,8,5 Phosphorus has 5 valence electrons, while others have less number of valence electrons.

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