The Development of the Atomic Model (6)

Chadwick’s Atomic Model (2)

Neutrons contribute almost half of the mass of an atom

The subatomic particles found in the nucleus of nitrogen atom

Proton and neutron

A person who discovered negatively-charged particles called electrons

J.J. Thomson

A person who discovered positively-charged particles called protons in the nucleus

Ernest Rutherford

A person who discovered neutral particles, that are neutrons in the nucleus

James Chadwick