P7 Oxidation Numbers

What is the oxidation number, for elements in Group 17?

• + 1

• -7

• -1

• 0

What is the charge, or oxidation number, for elements in Group 2?

• -2

• +2

• -3

Match the following, remember the rules

• the oxidation number is -3

• The oxidation number of a polyatomic ion must be equal to:

• 0 (zero)

• The oxidation number is Zero (0)

• Cu

• The oxidation number is -1

• NO₃^-

• the charge of the ion

• The algebraic sum of oxidation numbers of a neutral atom (alone atom) or molecule is equal to

What is the oxidation number for O₂?

• +1

• +2

• -1

• 0

What is the oxidation number of N in NO₂^1- ?

• -3
• +4
• -2
• +3

Oxidation number of O in the compound H₂O₂:

• 0

• -1

• -2

• +2

What is the total sum of oxidation numbers in the following compound Li₃PO₄?

• +2

• -1

• 0

• +5