The proton and neutron are collectively called as

The protons and neutrons are collectively called as ______.

Protons and neutrons are collectively known as ........

The quark content of proton and neutron are respectively

The quark content of proton and neutron are respectively

m_(P) and m_(n) are masses of proton and neutron respectively. An element of mass m has Z protons and N neutrons, then

m_(P) and m_(n) are masses of proton and neutron respectively. An element of mass m has Z protons and N neutrons, then

m_(p) and m_(n) are masses of proton and neutron respectively. An element of mass M has Z protons and N neutrons then

The sum of the numbers of protons and neutrons of an atom is called its _______.