Unit 2 Test Flashcards
1
Q
Mass of Proton
A
1 amu
2
Q
Mass of Neutron
A
1 amu
3
Q
Mass of Electron
A
0 amu
4
Q
Charge and symbol of proton
A
+, p+
5
Q
Charge and symbol of neutron
A
0, n^0
6
Q
Charge and symbol of electron
A
-. e-
7
Q
Proton discovered by
A
Rutherford
8
Q
Neutron discovered by
A
Chadwick
9
Q
Electron
A
Thomson
10
Q
Numbers next to symbols stand for:
A
Above: atomic mass. Below: atomic number
11
Q
Atomic mass
A
the average mass of an element’s naturally occurring atom, taking into account the relative abundance.
12
Q
Mass number
A
total number of protons and neutrons in the nucleus of the atom.
