Dalton, John

The atomic theory

By: Mike Curley, Adriana Bigelow, Tommy Romick, Cassi Pascucci

John Dalton was born on 1766 and died in 1844

5 Ideas About Atom

  1. All matter is composed of small particles called atoms that can and do form elements. Dalton's idea of an element (matter) is what we believe today.
  2. Atoms cannot be subdued, created, or destroyed.
  3. Atoms of a given element are identical in size, mass, and other properties.
  4. Atoms of different elements can combine to form compounds in simple whole-number ratios
  5. Atoms are combined, separated, or rearranged in chemicals reactions

Things that are wrong with this theory

1. Is composed of tiny individual atoms.

2. Atoms of an element are identical in mass.