The electronic configuration of Gadolinium (Atomic number $64$ ) is

[X e] 4 f^{7} 5 d^{1} 6 s^{2}

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[X e] 4 f^{8} 5 d^{6} 6 s^{2}

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[X e] 4 f^{3} 5 d^{5} 6 s^{2}

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[X e] 4 f^{7} 5 d^{2} 6 s^{1}

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Solution

The correct option is A $[X e] 4 f^{7} 5 d^{1} 6 s^{2}$
The general electronic configuration of lanthanoids is $[X e] 4 f^{1 - 145} d^{0 - 1} s^{2}$ and gadolinium with $Z = 64$ has electronic configuration as: $[X e] 4 f^{7} 5 d^{1} 6 s^{2}$ Thus, it belongs to lanthanoid series.

Hence, option (C) is correct.

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Similar questions

Q. Gadolinium belongs to

4 f

series. Its atomic number is

64

. Which of the following is the correct electronic configuration of gadolinium?

The electronic configuration of gadolinium (Atomic number 64) is
(a) $[X e] 4 f^{3} 5 d^{5} 6 s^{2}$
(b) $[X e] 4 f^{7} 5 d^{2} 6 s^{1}$
(c) $[X e] 4 f^{7} 5 d^{1} 6 s^{2}$
(d) $[X e] 4 f^{8} 5 d^{6} 6 s^{2}$

Q. The electronic configuration of gadolinium (At. no.

64

) is:

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Nature of Light

Standard VII Physics

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The electronic configuration of Gadolinium (Atomic number 64) is

The correct option is A [Xe]4f75d16s2The general electronic configuration of lanthanoids is [Xe]4f1−145d0−1s2 and gadolinium with Z=64 has electronic configuration as: [Xe]4f75d16s2 Thus, it belongs to lanthanoid series. Hence, option (C) is correct.

The electronic configuration of Gadolinium (Atomic number $64$ ) is