Question

What is meant by atomic mass number give brief information of three sub atomic particles with reference to electrical charge,mass and location?

Answer 1

Atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.

Proton +ve charged
mass=1.673 x 10^-24

Neutron 0 charged or neutral
mass=1.675 x 10^-24

Electrone –ve charged
mass=9.109 x 10^-28

Protons and neutrons are located in the nucleus, a dense central core in the middle of the atom, while the electrons are located outside the nucleus.