Writing Formulae

Question 1

Metal

Answer 1

We just write the element symbol eg: Cu, Al etc

Never diatomic

Question 2

Common covalent substances

Answer 2

Diatomic elements eg: O2, N2, H2 etc

The halogens

Question 3

Common strong acids

Answer 3

Hydrochloric acid= HCL

Sulfuric acid= H2SO4

Nitric Acid= HNO3

Question 4

Ionic Compound

Answer 4

We need to know what positive ion (cation) and what negative ions (anions) form the ionic compound, in order to work out the formulae of the compound