A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
Proton
100
This is the sum of the an atoms protons and neutrons
Mass Number
200
A subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
Neutron
200
This is the weighted average of mass of an element
Atomic Mass
300
A stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Electron
300
These are found on the right side of the periodic table
Metalloids or non metals
400
This is a small particle that makes up most types of atoms on earth
Atom
400
This is the number of protons in the nucleus of each atom of an element
Atomic Number
500
These are atoms of the same element that have different numbers of neutrons.