In the carbon family,elements other than carbon do not form $p\pi - p\pi$ bonds because their atomic radii are very ........

  • A
    small and diffuse to perform effective lateral overlap.
  • B
    large and diffuse,so they are too far apart to perform effective lateral overlap.
  • C
    large and diffuse to perform effective lateral overlap.
  • D
    small to perform both lateral and linear overlap.

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