question_answer

  Explain the following (i) The first ionization energy of nitrogen is greater than oxygen. (ii) Sulphur vapours exhibit some par magnetism. (iii) Of the noble gases only xenon is known to form real chemical compounds. (iv) Nitrogen shows a very little catenation tendency whereas phosphorus shows a clear tendency for catenation.

Answer:

  (a)Chlorine (b) Group - 17 (c) (valence shell) (d) (e)