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Flashcards in GCSE Chemistry Deck (5)
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1
Q

How do you calculate the number of outer electrons?

A

Group number

2
Q

How do you calculate the number of shells?

A

The period number

3
Q

What is an isotope?

A

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

4
Q

What is an ion?

A

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

5
Q

What is a rule for forming an ion?

A

The outer shell must either be full or empty