7.3 Redox

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Tags

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

The sum of all oxidation numbers in a neutral compound is ___.

• 0
• 1
• -1
• depends on the compound

What is oxidation number of Mn in MnO₂ ?

• 0
• +2
• -2
• +4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of Ca in Ca₃N₂?

• +3
• +2
• -3
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is oxidation number of Cr in
Cr₂O₇^2-?

• -2
• +2
• +6
• +12

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What are oxidation numbers?

• Number of electrons in the outer most energy level
• Number of protons
• Electrons gained or lost in chemical bonding
• Number of neutrons gained or lost

Tags

NGSS.HS-PS1-2

Oxidation number of O in its stable elemental form, O₂:

• 0

• -1

• -2

• +2

Oxidation number of O in the compound H₂O:

• 0

• -1

• -2

• +2

Oxidation number of Fe in its elemental form:

• 0

• -2

• +2

• +3