🧪 Chemistry · d- and f-Block Elements · NEET & JEE

The general outer electronic configuration of d-block (transition) elements is:

Answer: (n-1)d^1-10ns^0-2.

A (n-1)d^1-10ns^0-2
B ns^1-2
C (n-2)f^1-14ns²
D ns²np^1-6

Correct answer: A. (n-1)d^1-10ns^0-2

Explanation: Transition elements progressively fill the (n-1)d orbitals with the ns orbital usually holding 1 or 2 electrons, giving (n-1)d^1-10ns^0-2.

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.

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The general outer electronic configuration of d-block (transition) elements is:

Concept context

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