Predicting Oxidation Numbers

What is oxidation number of H in H₂O?

• 0
• -2
• -1
• +1

What is oxidation number of Cr in Cr₂O_7^2-?

• -2
• +2
• +6
• +12

What is oxidation number of P in K₃PO₄?

• +1
• +5
• -2
• 0

What is oxidation number of H in CaH₂?

• +1
• -1
• 0
• +2

What is oxidation number of Fe in FeO ?

• +2
• -2
• 0
• +1

What is oxidation number of Ca in CaCl₂ ?

• -1
• -2
• +1
• +2

What is oxidation number of O in O₂ ?

• 0
• -2
• +1
• +2

What is oxidation number of O in H₂O₂ ?

• -2
• -1/2
• +1
• -1

What is oxidation number of Na in Na⁺ ?

• 0
• +1/2
• +1
• -1

What is oxidation number of Mn in MnO₂ ?

• 0
• +2
• -2
• +4