Advertisements
Advertisements
प्रश्न
Give the electronic configuration of europium (Z = 63).
Advertisements
उत्तर
Europium (Eu) = [Xe] 4f7 6s2
APPEARS IN
संबंधित प्रश्न
Name the radioactive element in lanthanoids.
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.
The electronic configuration of transition element 'X' in +3 oxidation state is [Ar] 3d4. What is its atomic number?
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.
What is the general molecular formula of the product obtained on reacting lanthanoids (Ln) with nitrogen?
Which is the INCORRECT property of lanthanoids?
What is the value of effective magnetic moment found in +3 oxidation state of Chromium (Z = 24)?
Identify the correct decreasing order of ionic radii 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?
Give the properties of Lanthanoids.
Which one of the lanthanoids given below is the most stable in divalent form?
Lanthanoids and actinoids resemble in ______.
Which of the following factors may be regarded as the main cause of lanthanoid contraction?
The most basic hydroxide from the following is:
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.
Which from following is a lanthanoid element?
