Atomic Model - Scientists Flashcards
1
Q
John Dalton
A
Made the first atomic theory based on experiments (How an atom looked like)
2
Q
J.J Thomson
A
Discovered the electron; Cathode Ray Tube; Plum Pudding Model
3
Q
Ernest Rutherford
A
Discovered atomic nucleus; conducted the gold foil; concluded most of an atom is empty space.
4
Q
Niels Bohr
A
Electrons orbit the nucleus in energy levels; Different electrons have different energy levels.
5
Q
James Chadwick
A
Discovered neutrons; atomic mass did not equal protons and electrons; quantum model.
6
Q
Mass Number
A
P+N
7
Q
Atomic Number
A
Protons
8
Q
Atoms are neutral when:
A
Protons = Electrons
9
Q
P+N are in the:
A
Nucleus
10
Q
Electrons have a mass of:
A
0
11
Q
Cation
A
Positively Charged; Lose Electrons
12
Q
Anion
A
Negatively charged; gain electrons
