SOL Review

Question 1

First person to propose that matter was composed of particles

Answer 1

Democritus

Question 2

Discovered electron and developed Plum Pudding Model

Answer 2

J.J. Thompson

Question 3

Developed first atomic theory of matter. Atoms as solid spheres.

Answer 3

John Dalton

Question 4

Discovered nucleus through his gold foil experiment. Concluded that atom has positive nucleus and is mostly empty space.

Answer 4

Ernest Rutherford

Question 5

Discovered the charge of the electron

Answer 5

Robert Millikan

Question 6

Developed first quantum model of atom (planetary model). Electrons can only exist in specific energy levels.

Answer 6

Neils Bohr

Question 7

Published first periodic table arranged by atomic mass

Answer 7

Demitry Mendeleev

Question 8

Discovered that atoms (matter) can gain energy only in quantums

Answer 8

Max Planck

Question 9

Arranged periodic table by atomic number (# of protons)

Answer 9

Henry Mosley

Question 10

Responsible for “Uncertainty Principle”

Answer 10

Werner Heisenberg

Question 11

Developed wave theory (all moving objects exhibit wave like behavior).

Answer 11

Louis de Broglie