Q54 / 200 · NEET 2012 (Screening) · Chemistry

Identify the wrong statement in the following.

  • Correct answer
    A
    Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
  • B
    Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius
  • C
    Atomic radius of the elements increases as one moves down the first group of the Periodic Table
  • D
    Atomic radius of the elements decreases as one moves across from left to right in the 2 nd period of the Periodic Table

Solution

Atomic radius of the elements decreases across a period from left to right due to increase in effective nuclear charge. On moving down a group, since, number of shells increases, so atomic radius increases. Amongst isoelectronic species, ionic radius increases with increase in negative charge or decrease in positive charge.

Hence, the correct answer is option: 'A'.

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