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(a) rules for assigning and calculating oxidation number for atoms in elements, compounds and ions
(b) writing formulae using oxidation numbers
(c) use of a Roman numeral to indicate the magnitude of the oxidation number when an element may have compounds/ions with different oxidation numbers
(d) oxidation and reduction in terms of:
(i) electron transfer
(ii) changes in oxidation number
(e) redox reactions of metals with acids to form salts, including full equations
(f) interpretation of redox equations in (e), and unfamiliar redox reactions, to make predictions in terms of oxidation numbers and electron loss/ gain.