P1.1 Flashcards
1
Q
When did Dalton make his model?
A
1870
2
Q
What was the plum pudding model?
A
Electrons dotted in a large positive mass
3
Q
What was Daltons model?
A
An impenetrable sphere which could not be divided
4
Q
Who made the poem pudding model? When?
A
J.J. Thompson in 1897
5
Q
What did Rutherford discover with the alpha scattering experiment?
A
Most of an atom is empty, it contains a positively charged mass in the centre
6
Q
When did Ernest Rutherford make his model?
A
1899
7
Q
What was wrong with Rutherford’s model?
A
It didn’t account for electrons
8
Q
What did Bohr suggest?
A
Electrons move in fixed orbits called shells
9
Q
When did Neil Bohr make the Nuclear model of the atom?
A
1913
10
Q
Radius of an atom
A
1 x 10^(-10)
11
Q
Radius of a nucleus
A
1 x 10^(-15)
12
Q
Radius of a nucleus
A
1 x 10^(-15)
