Atomic Theory Timeline

Isaac Newton

Mar 10, 1704

Proposed a mechanical universe with small solid masses in motion. His contribution led to the understanding that atoms or particles move and are not stationary.

Dalton's Model of the Atom

Oct 21, 1803

Dalton stated that matter Consists of invisible atoms, they arrange in different combinations to make different compounds. He was the originator of atomic theory

J.J Thompson

Jan 1, 1904

Atoms have electrons. Electrons are much smaller than atoms, atoms are not indivisibile becasue they're made up of electrons which are much smaller.

Albert Einstein

Mar 10, 1905

Published the famous equation E=mc^2, this contributed to the world because it was a major proof that light had particle characteristics and led to the acceptance of quantum mechanics as a model.

Ernest Rutherford

Mar 9, 1911

Discovered that atoms had a nucleas, all the positive charge in an atom was concentrated in the centre, Atoms were pretty much empty space.

Niels Bohr

Mar 10, 1913

Niels Bohr stated that the Nucleas in the middle, but instead of the electrons being around the place they orbit the nucleas just like how the planets orbit around the sun

Ernest Rutherford

Mar 10, 1919

Ernest Rutherford discovered Protons, he contributed to the atomic theory by creating an atomic model and describes it tiny, dense, positively charged core called a nucleas.

Erwin Shrodinger

Mar 10, 1926

Lays the foundation of quantum wave mechanics. he stated that electrons didnt orbit around the nucleus but more like hyper active flies that buzzed around the atom sketching out different shapes. This allowed people to build upon his theory, making the atomic theory even more accurate

James Chadwick

Mar 10, 1932

Founder of the Neutron, this lead into the creation of an accurate model of an atom.