atomic structure Flashcards
1
Q
what is the relative mass of a proton
A
1
2
Q
what is the relative mass of a neutron
A
1
3
Q
what is the relative mass of a electron
A
0.0005
4
Q
what is the relative charge of a proton
A
+1
5
Q
what is the relative charge of a neutron
A
0
6
Q
what is the relative charge of a electron
A
-1
7
Q
what does number of electrons mean
A
number of protons
8
Q
what does the mass number tell you
A
how many protons there are
9
Q
how do you find the number of neutrons
A
subtracts the mass number from the atomic number
10
Q
what is it called when atoms join together
A
a molecule
11
Q
what is the nucleus made of
A
protons and neutrons
