This Study Mind Tutorial covers the following specification points:

CIE: 1.3.1, 1.3.2, 1.3.3, 1.3.4

1.3.1. know what is meant by the term ‘oxidation number’

1.3.2. be able to calculate the oxidation number of elements in compounds and ions The use of oxidation numbers in peroxides and metal hydrides is expected.

1.3.3. understand oxidation and reduction in terms of electron transfer and changes in oxidation number, applied to reactions of s- and p-block elements

1.3.4. understand oxidation and reduction in terms of electron loss or electron gain