Atomic structure Flashcards
1
Q
What charge does a proton have
A
+1
2
Q
What charge does a neutron have
A
0
3
Q
What charge does a electron have
A
-1
4
Q
What size is the nucleus compared to the rest of the atom
A
Very small
5
Q
Where is most of the mass situated in an atom
A
The nucleus
6
Q
What does the mass number of an atom tell us
A
The number of protons plus neutrons
7
Q
What is an isotope
A
An atom with the same number of protons but a different number of neutrons
8
Q
What does the atomic number tell us
A
The number of protons and electrons
9
Q
How do you work out the relative atomic mass
A
Add all mass numbers
