Question

what is the mass number of an aton with 3 protons,4 neutrons,and 3 electrons

Answer 1

Answer:

mass = 7 it is nitrogen. It is non metal

Explanation:

mass = neutron+proton

so,3+4=7

Answer 2

Mass number is = protons + neutrons
= 3+4 = 7

Atom is lithium as the atomic number (proton number) is 3