Introductory activity

What elements are present in Fe₂O₃?

• Iron and Oxygen

• Iron and Hydrogen

• Iron and Sulfur

• Fluorine and Oxygen

How many oxygen atoms are in Fe₂O₃?

• 1

• 2

• 3

• 4

What is the oxidation state of Fe in Fe₂O₃?

• +2

• +3

• 0

• -3

What is the oxidation state of Na in NaCl?

• +1

• 0

• -1

• +2

How many atoms are present in a CO₂ molecule?

• 1

• 2

• 3

• 0

What is the oxidation state of Carbon in CO₂?

• -4

• +4

• -2

• +2

What elements are present in H₂SO₄?

• Hydrogen, Sulfur, and Oxygen

• Hydrogen, Sodium, and Oxygen

• Hydrogen, Sulfur, and Chlorine

• Sulfur, Oxygen, and Calcium

What is the oxidation state of Sulfur in H₂SO₄?

• +2

• +4

• +6

• -2

How many aluminum atoms are in Al₂O₃?

• 1

• 2

• 4

• 5

What is the oxidation state of Copper in CuSO₄?

• +1

• -3

• +3

• +2