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Periodic Table and Periodicity question

2004 · Q101
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Periodic Table and Periodicity question

2004 · Q101

NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Ionic radii are
  1. A
    inversely proportional to effective nuclear charge
  2. B
    inversely proportional to square of effective nuclear charge
  3. C
    directly proportional to effective nuclear charge
  4. D
    directly proportional to square of effective nuclear charge.
View written solutionFree

Correct answer: A

Ionic radius in the nth orbit is given by

rn = n2a0Z∗{{{n^2}{a_0}} \over {{Z^*}}}Z∗n2a0​​ or, rn∝1Z∗{r_n} \propto {1 \over {{Z^*}}}rn​∝Z∗1​

When n is the principal quantum number, a0 the Bohr's radius of H-atom and Z*, the effective nuclear charge.

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