Groups
Periods
Nucleus
Protons, neutrons and electrons relative mass/charge
Electrons shell structure
What is the mass number, no. of protons, electrons and neutrons?
23
Na
11
S
L
G
Aq
Covalent bonding
Ionic bonding
Ionic Formulae
Calcium: Ca+²
Sulphate: SO₄-²
Calcium Sulphate: CaSO₄
Magnesium: Mg₂
Hydroxide OH¹
Mg(OH)₂
Elextrons in the same group...
This means...