The History of the Atom by Harmony and Jaiwun

Democritus

400

400 B.C.
He believed there was a basic building block of matter.
He based his theory off obervasations and natural curiosity. Bennet, Linda. "What Thompson Discovered." Thompson's Model. W3C, 2012. Web. 26 Feb. 2015.

Dalton

Jan 1, 1766

He said stuff can broken down into smaller elements.
Elements are atoms with different masses.
Compounds are a combination of different elements. Bennet, Linda. "What Thompson Discovered." Thompson's Model. W3C, 2012. Web. 26 Feb. 2015.

Thompson

Jan 1, 1856

Discovered the electron
1856 - 1940
He used the Cathode Ray Tube experiment. Bennet, Linda. "What Thompson Discovered." Thompson's Model. W3C, 2012. Web. 26 Feb. 2015.

Rutherford

Jan 1, 1871

1871 - 1937
Discovered the nucleus
He used gold foil experiment.
Discovered alpha and beta waves Bennet, Linda. "What Thompson Discovered." Thompson's Model. W3C, 2012. Web. 26 Feb. 2015.

Schrodinger

Feb 25, 1935

He used a mathmetical equation to discover the wave lenghts of atoms. Bennet, Linda. "What Thompson Discovered." Thompson's Model. W3C, 2012. Web. 26 Feb. 2015.

Bohr

Jan 1, 1992

He made a subtle tweak to Rutherford's planetary model of the atom ...
He used math to figure it out.
Around 1992 ... Bennet, Linda. "What Thompson Discovered." Thompson's Model. W3C, 2012. Web. 26 Feb. 2015.