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प्रश्न
Give the electronic configuration of europium (Z = 63).
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उत्तर
Europium (Eu) = [Xe] 4f7 6s2
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संबंधित प्रश्न
Explain the trend in an Oxidation state of 3d elements.
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.
Which statement(s) is/are CORRECT about applications of lanthanoid metals/ions and their compounds?
(I) The optoelectronics applications use lanthanoid ions as active ions in luminescent materials.
(II) Lanthanoid compounds are used in television tubes.
(III) Lanthanoids are used in hybrid cars, superconductors and permanent magnets.
The only radioactive element among the lanthanoids is ____________.
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What is the general molecular formula of the product obtained on reacting lanthanoids (Ln) with nitrogen?
Which is the INCORRECT property of lanthanoids?
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Identify the correct decreasing order of ionic radii of lanthanoids.
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Identify the last element in lanthanoid series.
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Write expected and observed electron configurations of 58Ce.
Eu (Z = 63) and Yb (Z = 70) show + 2 oxidation state. Explain.
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