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- Engineering
- The screening effect of d-electrons is:Option: 1 Much more than s-electronsOption: 2<
- #Amrita Engineering Entrance Examination
- #Joint Entrance Examination Main
- #Engineering
- #Chemistry
- #Classification of Elements and Periodic table
The screening effect of d-electrons is:
Much more than s-electrons
Equal to s-electrons
Much less than s-electrons
Equal to p-electrons
Answers (1)
Classification of Elements : d-block -
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The d-block is in between s and p blocks. In these elements, their last electron enters into any of the d-orbitals. These elements are also known as transition elements as their properties are in between s and p-block elements.
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The general electronic configuration of d-block elements is (n-1)d1-10ns1-2.
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These elements are in between 2-13 group in the periodic table.
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These metals have high values of melting points, boiling points, densities, thermal stability and hardness.
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They are ductile and malleable.
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They are good conductors of heat and electricity due to the presence of free electron.
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These metals and their compounds are widely used as catalysts.
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These metals also form nonstoichiometric and interstitial compounds with small size atoms like H, C, N, O which can be easily fitted in the vacant sides of the lattices of these metals. For example, Fe0.93O.
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The screening effect of electrons follows the given order:
s-electrons > p-electrons > d-electrons > f-electrons
Thus, the screening effect of d-electrons is much less than s-electrons.
Therefore, Option(3) is correct
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