d and f BLOCK ELEMENTS

What is the oxidation state of Copper in Cu₂O?

• 0
• +1
• +2
• +3

Which element is given as an example where the +6 oxidation state is more stable for the heavier congener?

• Vanadium
• Chromium (Cr vs Mo/W)
• Manganese
• Iron

Why is the +2 oxidation state particularly stable for Zinc?

• It is the only possible state
• It results in a completely filled 3d subshell
• It forms the strongest ionic bonds
• It has the lowest ionization energy

What is the oxidation state of Iron in Fe₂O₃?

• +1
• +2
• +3
• +4

Which of the following best describes the trend of oxidation state stability from Sc to Zn?

• Stability increases continuously
• Stability decreases continuously
• Stability of high states increases to Mn, then decreases
• Stability is constant throughout