1
Q
Describe the structure of the atom
A
A central nucleus containing positive protons and neutral neutrons orbitted by negative electrons.
2
Q
Why does a neutron have an overall neutral charge?
A
Because the positive protons and negative charge of the electrons cancel out each other to make a neutral neutron.
3
Q
What is the mass number
A
The number of protons and neutrons in the nucleus of an atom.
4
Q
What is the atomic number
A
The number of protons in the nucleus which equals the number of electrons.
AQA GCSE Additional Chemistry C2a
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