IMAT 2011 Q60 [Bond Formation]

How many nitrogen electrons are involved in bond formation in {HONO_2}?

A. 3
B. 4
C. 5
D. 6
E. 7

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Nitrogen belongs to group 15 on the periodic table which means that it has 5 valence electrons. Oxygen belongs to group 16 and has 6 valence electrons. Thus, the correct answer is C.

Learning how to draw lewis structure quickly is very important for the IMAT exam, you can use the following video as a reference:

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i know that the valance electron for nitrogen is 5 but according to the structure of the video nitrogen has only 4 valance electron involved not 5 so how can we say 5 electrons are involved in the bond formation?

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3 Covalent bonds + 1 Coordinate Bond = 5 N e-

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