The atomic radii of the elements are almost same of which seriesA. `Li

1.	The atomic radii of the elements are almost same of which seriesA. `Li - Be - B`B. `Na - K - Rb`C. `F - C1 - Br`D. `Fe - Co - Ni`
Answer» Correct Answer - D `Fe - Co - Ni`. With the increase in the d-electrons, screening effect increases, this counter balances the increased nuclear charge due to increase in atomic number. As a result atomic radii remain practically same after chrmium.

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The atomic radii of the elements are almost same of which seriesA. `Li - Be - B`B. `Na - K - Rb`C. `F - C1 - Br`D. `Fe - Co - Ni`

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