Old White Men Flashcards
1
Q
Democritus
A
theorized that matter is made of tiny invisible particles
2
Q
Dalton
A
atoms are tiny indivisible particles, mass of atoms of the same element are the same, atoms form molecules in whole number ratios
3
Q
Thompson’s Cathode-Ray Tube
A
electrical current in tube emits rays (electrons), move in negative direction
4
Q
Thompson’s Plum Pudding Model
A
electrons suspended inside positive charged atom
5
Q
Millikan
A
oil drop experiment, oppositely charged electrical plates and x-rays cause oil drops to be suspended, calculate charge of drops (electron)
6
Q
Rutherford
A
gold foil experiment, alpha particles projected at foil, determine existence of nucleus
