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Flashcards in GCSE Chemistry Deck (5)
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1

How do you calculate the number of outer electrons?

Group number

2

How do you calculate the number of shells?

The period number

3

What is an isotope?

An atom that has the same number of protons and different numbers of neutrons. The mass number is different

4

What is an ion?

A particle with the same number of protons as its parent atom with a different number of electrons.

5

What is a rule for forming an ion?

The outer shell must either be full or empty