GCSE Unit 1: Chemistry




Atoms have a small _______surrounded by _________





Atoms have a small nucleus surrounded by electrons

The Nucleus


It’s in the ______ of the atom


It contains _______ and ________


Protons are __________ charged


Neutrons have ________ charge


The nucleus has a ________ charge







It’s in the middle of the atom


It contains protons and neutrons


Protons are positively charged


Neutrons have no charge


The nucleus has a positive charge

 

The Electrons


Move ______ the _______


They’re __________ charged


They’re ____, but they cover a ___ __ _____


They occupy ______ around the nucleus


These shells explain  the _____ __ _________


Move around the nucleus


They’re negatively charged


They’re tiny, but they cover a lot of space


They occupy shells around the nucleus


These shells explain  the whole of chemistry

 

 

What is the charge of an atom

 

 

No charge – They are neutral

 

If there were 17 protons in an atom, how many electrons would there be?

 

17, because the number of protons always equals the number of electrons.

 

What happens if some electrons are added 

x

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