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Question
Give the electronic configuration of gadolinium (Z = 64).
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Solution
Gadolinium (Gd) = [Xe] 4f7 5d1 6s2
RELATED QUESTIONS
Which of the following statements are FALSE about lanthanoids?
(I) They have lower heat of atomization than transition metals
(II) They are soft metals with silvery white colour and densities of about 7 g cm−3.
(III) They react with water to give the metal hydroxide and oxygen gas.
(IV) They form hydroxides, which are covalent and basic.
The only radioactive element among the lanthanoids is ____________.
When lanthanoids (Ln) are heated to about 2800 K with carbon, the carbides with general formula ____________ are obtained.
What is the general molecular formula of the product obtained on reacting lanthanoids (Ln) with nitrogen?
Which is the INCORRECT property of lanthanoids?
Which element among the following lanthanoids has the smallest atomic radius?
The observed electronic configuration of promethium (atomic number 61) is ____________.
Which element from following forms colourless compounds in +2 oxidation state?
Identify the correct decreasing order of ionic radii of lanthanoids.
Which of the following properties is NOT of lanthanoids?
Identify the formula of lanthanoid oxide formed when lanthanoid (Ln) is burnt in oxygen.
Which among the following lanthanoids has smallest atomic size?
Lanthanoids and actinoids resemble in ______.
The most basic hydroxide from the following is:
Identify the last element in lanthanoid series.
Which element from following has largest atomic radius?
Write expected and observed electron configurations of 58Ce.
Eu (Z = 63) and Yb (Z = 70) show + 2 oxidation state. Explain.
What are the physical properties of lanthanoids?
Write two uses of lanthanoids.
Define actinoid contraction.
