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Periodic Table and Periodicity question

2010 · Q73
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Periodic Table and Periodicity question

2010 · Q73

NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is
  1. A
    Mg < Ca < Cl < P
  2. B
    Cl < P < Mg < Ca
  3. C
    P < Cl < Ca < Mg
  4. D
    Ca < Mg < P < Cl
View written solutionFree

Correct answer: B

Atomic radius decreases on moving from left to right in a period. so order of sizes for Cl, P and Mg is Cl < P < Mg. Down the group size increases. So overall order is : Cl < P < Mg < Ca.

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