BY GREG JOHNSTON

ATOMIC THEORY

• model developed to explain the properties and behaviors of atoms
• based on scientific evidence

JOHN DALTON

• English chemist
• Matter is composed of atoms
• Atoms of a given element are identical.
• Atoms cannot be created, destroyed, subdivided

JOHN DALTON CONTINUED

• Atoms combine/separate from other atoms
• Atoms combine with whole-number ratios to form atoms.
• Quaker

JJ. Thomson

• British physicist
• Atoms are not indivisible
• Plum-pudding atom
• Discovered electrons
• Noble Prize

EARNEST RUTHERFORD

• English chemist and physicist
• Gold foil experiment
• Atoms consist mostly of empty space
• Positive charges nucleus
• Noble Prize

Niels Bohr

• Danish physicist
• Planetary atom
• Permitted orbits
• Electrons could jump from one orbit to another

Irene Curie

• French scientist
• Atomic nuclei
• Projection of the nuclei
• Structure of the atom

Robert Milkan

• American physicist
• Oil-drop experiment
• Measured the charge of the electron
• Charge of an electron was -1.6x10-19

BIBLIOGRAPHY

• http://en.wikipedia.org/wiki/John_Dalton#Atomic_theory
• http://en.wikipedia.org/wiki/J._J._Thomson
• http://www.angelfire.com/sc2/atomtheory/
• http://www.scienceclarified.com/As-Bi/Atomic-Theory.html
• http://en.wikipedia.org/wiki/Ir%C3%A8ne_Joliot-Curie