State the formulae of the elements and compounds named in the subject content

Identify redox reactions by changes in oxidation number using: (a) the oxidation number of elements in their uncombined state is zero (b) the oxidation number of a monatomic ion is the same as the charge on the ion (c) the sum of the oxidation numbers in a compound is zero (d) the sum of the oxidation numbers in an ion is equal to the charge on the ion

Describe the neutralisation reaction between an acid and an alkali to produce water, ( H^+(aq) + OH^- (aq) ightarrow H_2O (l) )