Scientists Flashcards
1
Q
Democritus
A
- elements were made of atoms “atomos”
- atomos are indivisible
2
Q
Aristotle
A
Elements were made of earth, fire, wind, and water
3
Q
John Dalton
A
Daltons theory
- atoms can’t be created, separated, or destroyed
- whole # ratios
- elements have atoms
- chemical reactions: atoms combine, separate, rearrange
Sphere/ billiard ball model
4
Q
J.J. Thomson
A
Plum pudding model
Discovered electron
Cathode ray tube
5
Q
Ernest Rutherford
A
- gold foil experiment
- proton + neutron
- nucleus surrounded by large empty space
6
Q
Niels Bohr
A
- planetary model
Or it’s
7
Q
James Chadwick
A
- Discovered neutron
- radiation + alpha particles
8
Q
Erwin shrondinger
A
- electron cloud model
- equations
9
Q
Mosely
A
- atomic number
- newest periodic table
10
Q
Mendeleev
A
- atomic mass
