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प्रश्न
Which one of the following statements related to lanthanons is incorrect?
विकल्प
Europium shows +2 oxidation state.
The basicity decreases as the ionic radius decreases from Pr to Lu.
All the lanthanons are much more reactive than aluminium.
Ce4+ solutions are widely used as oxidising agents in volumetric analysis.
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उत्तर
All the lanthanons are much more reactive than aluminium.
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संबंधित प्रश्न
Which of the following lanthanoid ions is diamagnetic?
Which of the following oxidation states is most common among the lanthanoids?
What is lanthanoid contraction and what are the effects of lanthanoid contraction?
Out of Lu(OH)3 and La(OH)3 which is more basic and why?
Why do zirconium and Hafnium exhibit similar properties?
Which of the following is not an actinoid?
The electronic configuration of gadolinium (Atomic number 64) is ______.
The elements in which electrons are progressively filled in 4f-orbital are called ______.
In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, s, p, d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Arfbau principle, the seven periods have 2, 8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table.
The element with atomic number 57 belongs to ______.
Electronic configuration, [Ne] 3s2 3p4 is for ______.
