Oxidation Numbers Rules

Question 1

What is the oxidation state of hydrogen in a compound and what is the exception?

Answer 1

It is usually +1
Unless it’s bonded with a metal —> then it becomes -1 (hydrides)

Question 2

What is the oxidation state of fluorine in a compound?

Answer 2

1

Question 3

What is the oxidation number of oxygen in a peroxide?

Answer 3

-1

Question 4

What is the oxidation number of oxygen when it is bonded to fluorine?

Answer 4

+1

Question 5

What are the oxidation states of chlorine, bromine and iodine and what are the exceptions?

Answer 5

Usually -1
Except when in a compound with oxygen