History of the atom theory

Democritus

460 BCE

He was the one that developed the concept "atom",

Dalton's atomic model

1808

He made the first atomic theory, also elements are made up of very small particles called atoms.

JJ Thomson

1897

Discover of the electron, of isotopes and inventor of the mass spectrometer.

Ernest Rutherford

1911

He show that atoms have "+" in the middle and that has many empty space between but also discovered the protons and nucleus.

Niels Bohr

1913

Contributed to the understanding of the atom and quantum mechanics.

Edwin Schrodinger

1926

Schodinger used equations to described the like hood of finding an electron in certain position, also he described the electrons as waves with their probable location viewed as clouds.

James Chadwick

1932

Was the one that discovered the existence of neutrons and the neutral particle that share the nucleus with the charged proton.