1
Q
What is a molecule?
A
A group of atoms
2
Q
What is an isotope?
A
An atom of the same element with a different mass because it has a different number of neutrons
3
Q
What is the mass of an electron?
A
0.0005
4
Q
What is the atomic number?
A
The number of protons (smaller number)
5
Q
What is the mass number?
A
The number of protons and neutrons (bigger number)
6
Q
What is group 0 known as?
A
Noble gases
7
Q
Why are the nobles gases inert?
A
Because they have a full outer shell of electrons so they don’t need to gain or give any electrons
8
Q
What is an atom?
A
The smallest particle of mass
GCSE Chemistry
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