Q.
If NA is Avogadro's number then number of valence electrons in 4.2 g of nitride ions N3−
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a
2.4 NA
b
4.2 NA
c
1.6 NA
d
3.2 NA
answer is A.
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Detailed Solution
Valency shell electronic configuration of ‘N’ - 2S22p3 & N-3 - 2S22P6 14 gm N3− ions have 8NA valence electrons4.2 gm of N3− ions have = 8NA × 4.214 =2.4 NA
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