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=﻿ history of the atom.=
 * ﻿600 B.C. Thales of Miletus discovered that rubbing a piece of amber and fur together the piece of amber would attract bits of hair feathers and light objects.
 * ﻿﻿In 430 B.C a greek philosopher named, Democritus, cam eup with the idea of atoms. He ask "If you break a piece of matter in half, and then break it in half again,how many breaks will you have to break till you can break no further?" He named the matter particals 'atoms'.
 * ﻿﻿﻿﻿Aristole, another greek philosopher, said that Democritus' idea of the atom was wrong. He opinion meant alot to the people. so they then believed him.
 * No one tried to prove the Greeks wrong for more then 2000 years. In the early 1800's, John Delton, an English Chemist, he discovered that there were atoms in matter.

2. The central portion of an atom is known as the atomic nucleus. It consists of protons, which carry positive charge and neutrons, which carry no electric charge. The negatively charged electrons orbit the atomic nucleus. The protons and neutrons in an atomic nucleus contribute to the atomic mass. However, the electrons floating in the region around the nucleus are extremely lightweight subatomic particle