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Solid Sphere Model
In 1803, John Dalton hypothesized that an atom is a solid sphere.
This discovery made modern chemistry and physics possible. -
Plum Pudding Model
In 1904, J.J. Thompson proposed the Plum pudding model.
This creation let the world know that atoms have a positive and a negative charge. -
The Nuclear Model
In 1909, Ernest Rutherford's atomic model was discovered.This let us know that the atom is mostly space. -
The Bohr Planetry Model
In 1913, Neils Bohr showed us his Bohr Planetary model. It was named planetary model because both negatively and positively charged particles orbit the nucleus. Just like how planets orbit the sun. -
Quantum Mechanics Model
In 1926, a Austrian physicist named Erwin Schrodinger found the quantum mechanics model. Erwin's discovery gave us quantum numbers which helps us describe the energy level of an electron inside an atom.