Kenzie's Atomic Structure/Model

Demoticrus

Aug 28, 1000

Demoticrus had a theory that all matter consisted of small particles that can't be divided. He couldn't do experiments because it was Ancient Greek Time, so he would dicsuss it with others. It was during 500 B.C

Aristotle

Sep 28, 1000

Aristotle discovered a theory that there was a structure of matter. He discovered it in 500 B.C.He thought that there wasn't a limit to the number of times that matter can be divided. Arisotle made a chart to explain matter to others that he discussed with.

Isaac Newton

Nov 12, 1704

Isaac Newton proposed a mechanical universe with small solid masses in motion.

John Dalton

Oct 1, 1803

John Dalton had a theory that all matter is made up of individual particles that can't be divided. John Dalton would conduct experiments and gather evidence in his free time. He would measure the mass of elements that combine when compounds form.

Micheal Faraday

May 31, 1832

Micheal Faraday studied the effect of electricity on solutions, coined term "electrolysis" as a splitting of molecules with electricity, developed laws of electrolysis. Faraday himself was not a proponent of atomism

J.J. Thomson

Jul 4, 1897

Joseph John Thomson created a theory that objects with opposite particles attract, and the same particles repel each other. J.J. conducted experiments and made a model of his theory. He made a model that showed the positive charges and negative charges.

Hantaro Nagaoka

Oct 31, 1904

Hantaro is a Japanese physicist who suggests that an atom has a central nucleus. Electrons move in orbits like the sun.

Ernst Rutherford

Jan 11, 1911

Ernst had a theory that there are alpha particles that take over, and there are also positive charges in a nucleus. He thought that there wwas a nucleus in atoms. He would work with Ernst Mardsen in his experiments.

Neils Bohr

Oct 28, 1913

Neils Bohr had a theory that electrons had an arrangement and they revovled like the solar system. Bohr wored with Rutherford for a while, and then used Rutherford's theory and added onto it. He made a model of the electrons arrangement.

Louis de Broglie

Jul 22, 1924

Louis proposes a theory that moving particles like electrons have some properties of wave. Within a few years, enough evidence was collected to prove Louis's theory.

Erwin Schrodinger

Mar 3, 1926

Erwin developed math equations to describe the motion of electrons in atoms. He created a model of an electron cloud.

James Chadwick

Dec 25, 1932

James is a Birtish physicist, and he confirmed the exsistence of neutrons which have no charge. Atomic nuclei contain neutrons and positively charged protons.