2.1.5 redox

Question 1

rules for oxidation state
2.1.5(a)

Answer 1

-the sum of all oxidation numbers in a compound is 0
-the oxidation state of an element is 0
-the sum of all oxidation states in an ion is equal to the charge on that ion
-the oxidation state of oxygen -2 inside an ion or compound
-the oxidation state of hydrogen +1 inside an ion or compound
-group 1 have an oxidation state of +1 and group 2 +2