Question

number of electrons in 4.2 gram of Nitrogen atom​

Answer 1

No. of moles of nitrogen atom in 4.2g is equal to (4.2)/14 moles

n = 0.3 moles

No. of electrons in 1 mol of N atom is equal to 6.022×10²³(7)

Therefore no. of electrons in 0.3 moles is equal to :-

= (0.3)(6.022×10²³)(7) electrons

= (7)18.066×10²² electrons .

= 126.42 ×10²² electrons

Hope I am right .