What is an atom
An atom is the smallest particle of an element that still has its chemical properties. Different elements are made from different atoms
What is a molecule made from
From two or more atoms joined together. They are joined by attractive forces called chemical bonds
Whilst the inside of an atom is mostly empty space, it does contain three even smaller subatomic particles. Which are:
Protons and neutrons, joined together in the nucleus at the centre.
Electrons surrounding the nucleus in shells
Relative mass of each subatomic particles
Proton- 1
Neutron- 1
Electron- 0.0005
Relative charge of each subatomic particle
Proton- +1
Neutron- 0
Electron- -1