d and f BLOCK ELEMENTS

In the first transition series, which element commonly shows only the +2 and +3 oxidation states?

• Titanium (Ti)
• Vanadium (V)
• Chromium (Cr)
• Scandium (Sc)

Which of the following elements shows the highest number of oxidation states?

• Scandium (Sc)
• Titanium (Ti)
• Vanadium (V)
• Manganese (Mn)

What is the electronic configuration of Th⁴⁺?

• [Rn] 5f⁰
• [Rn] 5f¹
• [Rn]
• [Rn] 6d²

What is the electronic configuration of Pm³⁺?

• [Xe] 4f⁵
• [Xe] 4f⁴
• [Xe]
• [Xe] 4f³

What is the electronic configuration of Mn²⁺?

• [Ar] 3d³
• [Ar] 3d⁵
• [Ar] 4s²
• [Ar] 3d⁴ 4s¹