Historical Figures In Chemistry

Oldies but goodies

Democritus

Atomos The indivisible

particleI’m Aristotle

and I banish

Democritus!

Boyle and Newton

John Dalton Matter is made of

indivisible atoms Atoms of same

element are identical Atoms of different

elements are different

Elements combine in simple whole number ratios to form compounds

Joseph John (JJ) Thomson Cathode Tube Ray

Experiment

http://www.aip.org/history/electron/

Ernest Rutherford Gold Foil

Experiment

Gold Foil Experiment

Robert Millikan Oil Drop

Experiment 1.60217646 × 10-

19 coulombs

ANTOINNE LAVOISIER Father of

Chemistry Law of

Conservation of MASS

HENRY MOSELEY

Atomic Number

Neils Bohr Atomic Model Line Emission

Spectrum

James Chadwick Neutron

Jimmy

Neutron?

Max Planck Quantum Model Planck’s Constant

6.626068 × 10-34

m2kg/s