Question

If an atom of 'X' whose Z=7 and n=7, what will be its mass number

Answer 1

Explanation:

Z=7 it means no.of protons(p) = 7

Given no.of neutrons(n) = 7

i.e. Mass no.(A) = n+p = 7+7 = 14

And the element with Z= 7 is Nitrogen (N)