The electronic configurations of Eu -Atomic No- 63- Gd -Atomic No- 64- and Tb -Atomic No- 65- are-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-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-7 6s-2-Xe-4f-7 5d-1 6s-2-and-Xe-4f-9 6s-2

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Lanthanides Electronic Configuration

The electroni...

Question

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

[X e] 4 f^{6} 5 d^{1} 6 s^{2}, [X e] 4 f^{7} 5 d^{1} 6 s^{2} a n d [X e] 4 f^{8} 5 d^{1} 6 s^{2}

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[X e] 4 f^{7} 6 s^{2}, [X e] 4 f^{7} 5 d^{1} 6 s^{2} a n d [X e] 4 f^{9} 6 s^{2}

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[X e] 4 f^{7} 6 s^{2}, [X e] 4 f^{8} 6 s^{2} a n d [X e] 4 f^{8} 5 d^{1} 6 s^{2}

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[X e] 4 f^{6} 5 d^{1} 6 s^{2}, [X e] 4 f^{7} 5 d^{1} 6 s^{2} a n d [X e] 4 f^{9} 6 s^{2}

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Solution

The correct option is B $[X e] 4 f^{7} 6 s^{2}, [X e] 4 f^{7} 5 d^{1} 6 s^{2} a n d [X e] 4 f^{9} 6 s^{2}$
Remember, Eu has a half filled 4f series and so does Gd. This information is enough to arrive at the correct answer.

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Similar questions

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 CONFIGURATIONS OF EU(ATOMIC NO.63),Gd(ATOMIC NO.64),AND Tb(ATOMIC NO.65) IS [Xe]4f76s2,[Xe]4f75d16s2,and [Xe]4f9 6s2.MY QUESTION IS WHY IN Gd [atomic no.64]instead of placing one electron in 4f7 it is placed in 5d orbital while in Tb it is placed in 4f and the 5d is not taken in this case?

Q. how to solve question no.5

Q5. The electronic configuration of gadolinium (Atomic number 64) is:

(a) [Xe]4 ƒ³ 5d⁵ 6s² (b) [Xe] 4 ƒ⁷ 5d² 6s¹

(c) [Xe] 4 ƒ⁷ 5d¹ 6s² (d) [Xe] 4ƒ⁸ 5d⁶ 6s²

Q. An element with the electronic configuration

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

lies in the:

The electronic configuration of Eu³⁺ ion is:

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

The correct option is B [Xe]4f76s2,[Xe]4f75d16s2 and [Xe]4f96s2Remember, Eu has a half filled 4f series and so does Gd. This information is enough to arrive at the correct answer.

The correct option is B $[X e] 4 f^{7} 6 s^{2}, [X e] 4 f^{7} 5 d^{1} 6 s^{2} a n d [X e] 4 f^{9} 6 s^{2}$
Remember, Eu has a half filled 4f series and so does Gd. This information is enough to arrive at the correct answer.