GCSE Chemistry Flashcards
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
