alleryThe general electronic configuration of actinoids is:
A[Xe] 4fⁿ 5d⁰⁻¹ 6s²
B[Rn] 5fⁿ 6d⁰⁻¹ 7s²
C[Kr] 4fⁿ 5d¹⁰ 6s²
D[Ar] 3dⁿ 4s²
Answer & Solution
Correct answer: B. [Rn] 5fⁿ 6d⁰⁻¹ 7s²
**Actinoid general config: [Rn] 5f^(0–14) 6d^(0–1) 7s²**.
Fourteen electrons fill the 5f subshell across Th to Lr.
Some irregularities (Am, Cm) due to stability of f⁰, f⁷, f¹⁴.
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