Identify the wrong statement in the following.

  • A
    Atomic radius of the elements increases as we move down the first group of the periodic table.
  • B
    Atomic radius of the elements decreases as one moves across from left to right in the $2^{nd}$ period of the $P.T$.
  • C
    Amongst isoelectronic species,smaller the positive charge on the cation,smaller is the ionic radius.
  • D
    Amongst isoelectronic species,greater the negative charge on the anion,larger is the ionic radius.

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Among the elements $Li$,$N$,$C$ and $Be$,the one with the largest atomic radius is

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How does atomic radius vary in a period and in a group? How do you explain the variation?

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In which of the following pairs is the difference between the covalent radii of the two metals maximum?

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