If NA is Avogadro’s number then number of valence electrons in 4.2 g of nitride ions (N3-)

Question

If NA is Avogadro’s number then number of valence electrons in 4.2 g of nitride ions (N3-) (A) 2.4 NA (B) 4.2 NA (C) 1.6 NA (D) 3.2 NA

Tardigrade Admin · Accepted Answer

14 gm N3- ions have 8NA. valence electrons 4.2 gm of N3- ions have =(8NA×4.2/14)=2.4NA

Q. If $N_{A}$ is Avogadro’s number then number of valence electrons in $4.2 g$ of nitride ions $(N^{3 -})$