12
If Nis Avogadro's number then number of electrons in 4.2 g of N-.-
(1) 2.1 NA
(2) 3 N.
(3) 6 Na
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10
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
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