Give one example each of polyatomic element and polyatomic ion

(a)Give one point of difference betweeen an atoms and an ion. (b)Give one example of each of polyatomic cation and a polyatomic anion. (c )Identify the correct name of FeSO_(3) from the given names-Ferrous sulphate, Ferrous sulphide, Ferrous sulphite. (d)Write the chemical formulae for the chloride the magnesium.

Give an example for polyatomic molecule.

With reference to elements - define the term 'molecule'. Give two examples each of a monoatomic, diatomic & polyatomic molecule.

What is a polyatomic ion?

Give one example of each Element.

The polyatomic ion is