People Flashcards
1
Q
Arranged the Periodic Table by atomic mass
A
Dimitri Mendeleev
2
Q
Arranged the Periodic Table by atomic mass
A
Henry Mosely
3
Q
- initial idea of the atom
* atomos
A
Democritus
4
Q
•”Solid Sphere Model”
A
John Dalton
5
Q
- Cathode Ray Tube Experiment
- Discovered the electron
- ”Plum Pudding Model”
- Positive cloud with electrons embedded
A
J.J. Thomson
6
Q
- Gold Foil Experiment
* ”Nuclear Model”
A
Ernest Rutherford
7
Q
Proved
•Atoms have small dense nuclei containing most of the positive charge
•Atoms are mostly empty space
•Electrons are on the outside
A
Ernest Rutherford
8
Q
- Oil Drop Experiment
* Discovered the charge of electrons
A
Robert Millikan
9
Q
- ”Planetary Model”
* Energy levels
A
Niels Bohr
