History Of The Atom

Democritus

400

He said that everything is made up of atoms. The atoms are small and can not be broken up into smaller pieces. He figured this out by breaking up an object, it will get smaler and eventually you won't be able to break it up anymore. Coffey, Jerry. "Democritus Atom." Universe Today. N.p., 22 Mar. 2010. Web. 19 Feb. 2015. Dewitt, Tyler. "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. N.p., 6 Dec. 2012. Web. 19 Feb. 2015.

Dalton

Feb 26, 1808

Dalton conclueded that thing can be broken into elements. He added on to what the Greek Philosphers said " atoms are small things and are differnt in masses and properties.
Dalton invested a considerable measure of time in his lab watching different compound responses. By taking a gander at Allain, Rhett. "The Development of the Atomic Model." Dot Physics. N.p., 4 Sept. 2009. Web. 23 Feb. 2015.
Bennett, Linda. "What Dalton Discovered." Dalton's Model. N.p., Nov. 2012. Web. 24 Feb. 2015.

J.J. Thomson

Feb 26, 1897

Thomson discovered the electron.Dalton invested a considerable measure of time in his lab watching different compound responses. By taking a gander at how things responded and recombined to structure new substances, Dalton had the capacity expand on Democritus' concept of particles as the basic building hinder's of matter and go further to say that there were various "flavors" or sorts of molecules. "The Development of the Atomic Model." Dot Physics. N.p., n.d. Web. 23 Feb. 2015.

Rutherford

Feb 26, 1909

Rutherford Discovered the nucleus of the atom.He shot some alpha particles at some gold foil. "What Rutherford Discovered." Rutherford. N.p., n.d. Web. 25 Feb. 2015.
"The Development of the Atomic Model." Dot Physics. N.p., n.d. Web. 23 Feb. 2015.

Bohr

Feb 25, 1912

Bohr discovered that all planets are staying in place by gravity.
In an atom the attractive force is electrical, and the attractive electrical force is actually much stronger than gravitational attractions. If it were really just a matter of negatively charged electrons. "What Bohr Discovered." Bohr's Model. N.p., n.d. Web. 25 Feb. 2015.

Schrodinger and Heisenberg Model

Feb 25, 1926

He thought electrons in an atom moved like light waves. He came up with a complicated equation know as, Schrodinger equation.
He also studied Bohr's model and figured out some of his theories were not scientifically proven. "Schrodinger Proposes the Wave-Mechanical Theory of the Atom." N.p.: n.p., n.d. N. pag. Print.