Question

Tabulate the atomic and mass number neutrons protons and electron for the elements starts from 21 to 30 in the periodic table

Answer 1

So, to determine the number of neutrons in atom, we only have to subtract the number of protons from the mass number. Take note that the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number (Also, called as atomic mass).

Answer 2

Answer:

it is also known as the determine of the atomic and mass number which is neutron Proton electron for the element started from 21 in the periodic table