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Q.

Noble gases exist only in monoatomic states. This is due to 

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a

Zero electron affinity

b

Non availability of unpaired electrons 

c

High ionization energy

d

Large size

answer is A.

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Detailed Solution

  • Noble gases are inert in nature. Helium, neon, argon, krypton, xenon and radon are noble gases present in group 18.
  • The general electronic configuration of Nobel gases -ns2np6 which is full-filled, paired and hence stable. Thus, due to unavailability of unpaired electrons, they exist in monatomic state.
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