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The D-And-f-Block Elements

Question

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Gadolinium belongs to 4f series. Its atomic number is 64. which of the following is the correct electronic configuration of gadolinium?

[Xe]4f⁸ 6d²

[Xe]4f⁹5s¹

[Xe]4f⁷ 5d¹6s²

[Xe]4f⁶5d²6s²

Solution

C.

[Xe]4f⁷ 5d¹6s²

Atomic number of Gadolinium = 64
electronic configuration of Gd,
[Xe]4f⁷ 5d¹6s²

Some More Questions From The d-And-f-Block Elements Chapter

Explain why Cu⁺ ion is not stable in aqueous solutions?

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

The outer electronic configuration of copper is 3d¹⁰ 4s¹, yet it is considered transition element. Why?

Why the melting points of transition elements are high?

Why Zn, Cd and Hg are not regarded as transition elements?

Name the first element of 3rd transition series.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Why are transition elements so named?

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