Answer: Strong metallic bonding involving both s and d electrons.
- A Strong metallic bonding involving both s and d electrons
- B A significant degree of ionic character within the metallic lattice
- C Their unusually large atomic masses compared to main-group metals
- D Their underlying noble gas electron configuration
Correct answer: A. Strong metallic bonding involving both s and d electrons
Explanation: Participation of both 4s and 3d electrons in metallic bonding gives transition metals stronger metallic bonds and higher melting points than s-block metals.
Aqueous solutions of transition metal ions show characteristic colours caused by electrons absorbing visible light to jump between split d-orbitals; the exact colour depends on the metal, its oxidation state, and surrounding ligands.
Concept context
Transition metals (d-block) and lanthanides/actinides (f-block). Known for coloured compounds, variable oxidation states, complex formation, and catalytic properties. Frequently tested in JEE and NEET.