Question

and atoms contains 3 protons 3 electrons and 4 nutrients find its atomic number mass number and valency

Answer 1

Atomic no. = Z = no. of protons = 3
Mass number = no.of protons + no. of neutrons = 3 + 4 = 7
Valency = 1 (because first shell call accommodate only 2 electron so remaining 1 shifts to other shell making valency +1)