d and f BLOCK ELEMENTS

Which of the following is NOT a typical metallic property displayed by transition elements?

• High thermal conductivity
• High electrical conductivity
• Metallic lustre
• High volatility

Why are Sc³⁺ and Zn²⁺ ions typically colorless?

• They are always in aqueous solution
• They have partially filled d subshells
• They absorb all wavelengths of visible light
• They have either empty (Sc³⁺) or full (Zn²⁺) d subshells, preventing d-d transitions.

What is the maximum common oxidation state exhibited by Manganese (Mn)?

• +2
• +4
• +6
• +7

Why do transition elements have variable oxidation states?

• They always lose all their d-electrons first
• They have very low ionization energies for all electrons
• The energy levels of (n-1)d and ns orbitals are similar, allowing electrons from both to be involved in bonding.
• They only gain electrons

What is the ground state electronic configuration of Copernicium (Cn, Z=112)?

• [Rn] 5f¹⁴ 6d⁹ 7s³
• [Rn] 5f¹⁴ 6d⁸ 7s⁴
• [Rn] 5f¹⁴ 6d¹¹ 7s¹
• [Rn] 5f¹⁴ 6d¹⁰ 7s²