Oxidation State Rules

Question 1

Oxygen

Answer 1

Has a oxidation number of -2 unless combined with fluorine, then it has a charge of +1 or +2.
When it is in ANY peroxide it has a charge of -1

Question 2

Peroxide

Answer 2

Any compound with an oxygen-oxygen single bond, each with a charge of -1

Question 3

Hydrogen

Answer 3

Mostly +1, unless combined with ONLY a METAL then it is -1

This is called a metal hydride

Question 4

The oxidation state of any free element is

Answer 4

Zero