Kelvi

The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are

medium

The d and f Block Elements

2016

chemistry

$[Xe]4f^7 6s^2, [Xe]4f^8 6s^2 and [Xe]4f^8 5d^1 6s^2$

$[Xe]4f^6 5d^1 6s^2, [Xe]4f^7 5d^1 6s^2 and [Xe]4f^9 6s^2$

$[Xe]4f^6 5d^1 6s^2, [Xe]4f^7 5d^1 6s^2 and [Xe]4f^8 5d^1 6s^2$

$[Xe]4f^7 6s^2, [Xe]4f^7 5d^1 6s^2 and [Xe]4f^9 6s^2$

Explanation

To solve this problem, we need to determine the electronic configurations of europium (Eu), gadolinium (Gd), and terbium (Tb). $\newline$ The atomic numbers are given as follows: $\newline$ • Eu (Atomic No. 63) $\newline$ • Gd (Atomic No. 64) $\newline$ • Tb (Atomic No. 65) $\newline$ Let's analyze the electronic configurations step-by-step: $\newline \newline$ 1. Europium (Eu, Atomic No. 63): $\newline$

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