Atomic Model (1808)
Plum-pudding model (1904)
Nuclear Model (1911)
Planetary Model (1913)
Quantum Mechanical Model (1926 - present)
Atomic Model;
Matter is made of small indivisible atoms.
Atoms can't be subdivided, created or destroyed
1) Atoms of the same element have the same property
2) Atoms of Different elements have different properties
3)Atoms of different elements can form compounds.