Oxidation is the _________ of electrons.

• loss

• gain

• sharing

• transfer

Reduction is the ___________ of electrons.

• loss

• gain

• sharing

• transfer

What is the oxidation number of nitrogen in N₂?

• -3

• 0

• +4

• -1

Determine the oxidation number of Cr in CrO₄^2-.

• +6

• 0

• +2

• +3

What is oxidation number of O in O₂ ?

• 0
• -2
• +1
• +2

What is oxidation number of H in H₂O?

• 0
• -2
• -1
• +1

Tags

NGSS.HS-PS1-1

What is oxidation number of H in CaH₂?

• +1
• -1
• 0
• +2

Tags

NGSS.HS-PS1-1

What is oxidation number of Fe in FeO ?

• +2
• -2
• 0
• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an atom loses electrons during a chemical reaction, the atom was:

• Oxidized
• Reduced
• Neutralized
• Precipitated

Tags

NGSS.HS-PS1-2

Another name for a "oxidation-reduction" reaction is

• chemical reaction
• neutralization reaction
• redox reaction
• nuclear reaction