A T O M I C T H E O R Y Reg

ATOMIC THEORY Building blocks of matter

In the beginning ,[object Object]

DEMOCRITUS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Aristotle ,[object Object],[object Object],[object Object],[object Object],[object Object]

Antoine Lavoisier ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Joseph Proust ,[object Object],[object Object],[object Object]

John Dalton ,[object Object],[object Object],[object Object],[object Object],[object Object]

Dalton pictured compounds as collections of atoms. Here NO, NO 2 , and N 2 O are represented.

John Dalton (1766 – 1844) was an English scientist who made his living as a teacher in Manchester.

Dalton’s atomic theory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Subatomic Particles NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM Most of the atom’s mass. QUARKS Atomic Number equals the # of... equal in a neutral atom

Subatomic Particles ,[object Object],[object Object],[object Object],[object Object],He

PARTICLES OF THE ATOM ,[object Object],[object Object],[object Object],[object Object],[object Object]

Are Atoms Really Unbreakable? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Schematic of a cathode ray tube.

Thomson’s Plum Pudding Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

One of the early models of the atom was the plum pudding model.

Hantaro Nagaoka ,[object Object],[object Object],[object Object],[object Object],[object Object]

Robert Millikan ,[object Object],[object Object],[object Object],[object Object],[object Object]

Rutherford’s Gold Foil Experiment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Rutherford’s experiment on  -particle bombardment of metal foil.

Rutherford’s Results ,[object Object],[object Object],[object Object]

(a) The results that the metal foil experiment would have yielded if the plum pudding model had been correct. (b) Actual results.

Rutherford’s Nuclear Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ernest Rutherford (1871 – 1937) was born on a farm in New Zealand.

Structure of the Nucleus ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Bohr Model ,[object Object],[object Object],[object Object],[object Object]

The Modern Atom ,[object Object],[object Object],[object Object],[object Object],[object Object]

A nuclear atom viewed in cross section.

Atomic models Dalton ,[object Object],[object Object],[object Object],H. Nagaoka

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