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प्रश्न
Illustrate by taking examples of transition elements and non-transition elements that oxidation states of elements are largely based on electronic configuration.
उत्तर
The electronic configuration of \[\ce{Cr}\] = 1s2 2s2 2p6 3s2 3p6 4s1 3d10
The electronic configuration of \[\ce{Cr}\] after losing one electron= 1s2 2s2 2p6 3s2 3p6 3d10
The electronic configuration of \[\ce{F}\] = 1s2 2s2 2p6 3s2 3p5
The electronic configuration of \[\ce{F}\] after gaining one electron= 1s2 2s2 2p6 3s2 3p6
From the above electronic configuration we can see that chromium will achieve stable electronic configuration after losing one 4s electron and fluorine will achieve stable electronic configuration after gaining one electron. So, the oxidation of chromium will be +1 and that of fluorine will be –1.
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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?
The most common oxidation state of actinoids is ____________.
What is lanthanoid contraction and what are the effects of lanthanoid contraction?
Compare lanthanoids and actinoids.
Which of the following is not an actinoid?
The electronic configuration of gadolinium (Atomic number 64) is ______.
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 ______.
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Size of Bk3+ ion is less than Np3+ ion.
Reason R: The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below:
