12If Nis Avogadro's number then number of electrons in 4.2 g of N-.-(1

1.	12If Nis Avogadro's number then number of electrons in 4.2 g of N-.-(1) 2.1 NA(2) 3 N.(3) 6 Na
Answer» Answer: 2.1 NA Explanation: no.of moles of N = 4.2/14. {atomic MASS of N = 14} no.of moles = 0.3 no.of atoms = 0.3 NA no.of electrons in 1 atom =7 no.of electrons in 0.3 NA atoms = 7 × 0.3 = 2.1 NA

12If Nis Avogadro's number then number of electrons in 4.2 g of N-.-(1) 2.1 NA(2) 3 N.(3) 6 Na

Answer»

Answer:

2.1 NA

Explanation:

no.of moles of N = 4.2/14.

{atomic MASS of N = 14}

no.of moles = 0.3

no.of atoms = 0.3 NA

no.of electrons in 1 atom =7

no.of electrons in 0.3 NA atoms = 7 × 0.3

= 2.1 NA