atoms Flashcards
1
Q
what was jj thomsons atom model called
A
plum pudding model
2
Q
what did ernest rutherford discover?
A
mass is concentrated in the centre
nucleus is charged
most atoms are empty space
3
Q
what did neils bohr theorise
A
the electrons are in shells orbiting the nucleus
4
Q
what did james chadwick discover
A
neutrons in the nucleus
5
Q
what is the relative charge of the electron
A
-1
6
Q
what is the relative charge of the proton
A
+1
7
Q
what is the relative charge of the neutron
A
0
8
Q
what is the relative mass of the proton
A
1
9
Q
what is the relative mass of the neutron
A
1
