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How ionic radii varies along the group and period. Calculate the effective nuclear charge experienced by the 4s electron inpotassium atom |
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Answer» 1)The ionic radii increases down the group and decreases across a period2)Zeff = Z - S where Z is the nuclear charge (19 for K) and s is the screening of the nuclear charge by all the other e⁻. S is calculated by Slater's Rules[1s^2] [2s^2 2p^6] [3s^2 3p^6] [4s^1]S for 4s = 2 + (8×1.0) + (8×0.85) = 16.8Zeff = 19 - 16.8 = 2.2 |
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