1
Q
What is the mass number?
A
Total number of protons and neutrons
2
Q
What’s the atomic number?
A
Number of protons
3
Q
What’s the relative mass of a proton?
A
1
4
Q
What’s the relative mass of a neutron?
A
1
5
Q
What’s the relative mass of an electron?
A
Very small
6
Q
What’s an isotope?
A
Atoms of the same element that have different numbers of neutrons
7
Q
Which element does the relative atomic mass of an element compare with?
A
Carbon 12
8
Q
How is the relative formula mass calculated?
A
Add all the relative atomic masses of a compound together
9
Q
What is the relative formula mass of a substance in grams known as?
A
1 mole of that substance
Chemistry Unit 2
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