JEE Main · 2020 · Shift-ImediumDNF-251

The correct electronic configuration and spin-only magnetic moment (BM) of Gd3+ (Z = 64), respectively, are : (1) [Xe]…

d & f-Block Elements · Class 12 · JEE Main Previous Year Question

Question

The correct electronic configuration and spin-only magnetic moment (BM) of $\ce{Gd^3+}$ (Z = 64), respectively, are : (1) $\ce{[Xe] 4f^7}$ and 8.9 (2) $\ce{[Xe] 4f^7}$ and 7.9 (3) $\ce{[Xe] 5f^7}$ and 8.9 (4) $\ce{[Xe] 5f^7}$ and 7.9

Options

a
$\ce{[Xe] 4f^7}$ and 8.9
b
$\ce{[Xe] 4f^7}$ and 7.9
✓
c
$\ce{[Xe] 5f^7}$ and 8.9
d
$\ce{[Xe] 5f^7}$ and 7.9

Correct Answerb

$\ce{[Xe] 4f^7}$ and 7.9

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