What is the identity of a 2nd-row element that has three valence electrons?

1 Answer
anor277
Feb 13, 2017

"Boron........."

Explanation:

Boron, Z=5, has 3 valence electrons: 2s^(2)2p^1. Carbon, Z=6, has 4 valence electrons: 2s^(2)2p^2. Nitrogen, Z=7, has 5 valence electrons: 2s^(2)2p^3. And fluorine, Z=7, has 7 valence electrons: 2s^(2)2p^5. Of course, these valence electrons are active in the geometry and structure of the compounds of these species.

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