Although, nitrogen does not adsorb on a surface at room temperature, it adsorbs on the surface at 83 K. Which one of the following statements is correct ?

• A

  At 83 K, there is formation of monolayer

• B

  At 83 K nitrogen is adsorbed as atoms

• C

  At 83 K nitrogen molecules are held by chemicals bonds

• D

  At 83 K there is formation of multimolecular layers