polyatomic ions

Question 1

number 1 rule!

Answer 1

Polyatomic ions cannot be altered. For example, SO₄¯² must always stay as SO₄¯²

Question 2

but what is there is more than one?

Answer 2

to indicate more than one polyatomic ion, use brackets with a subscript.

Question 3

what are polyatomic ions

Answer 3

Polyatomic ions are groups of atoms (non-metals) that have an overall charge. They behave as an overall ion particle.
* Ca(OH)₂ indicates one calcium ion and two hydroxide ions
* Al₂ (SO₄)₃ indicates two aluminium ions and three sulphate ions.