ATOMIC THEORY AND ATOMS

What is an atom?
An atom is the smallest particle into which an element can be divided and still be the same substance.

ARISTOTLE

• Aristotle did not believe in the Atomic Theory
• He believed everything was made of fire, earth, water and air.
• He did not believe that there was a smaller unit of matter.
• He was also a Greek philosopher
• Time Period: 384- 322 BC

MURRAY GELL-MANN AND GEORGE ZWEIG
-Discovered quarks in 1963
-Quarks are the smaller particle composition of protons and neutrons
-Discovered the gluon
-Gluon is a subatomic particle that "glues" quarks together using a strong nuclear force

SOURCES

• Wikipedia.com
• images.google.com
• cstl-csm.semo.edu
• the-history-of-the-atom.wikispace.com