Which group has high ionization energies but very weak electron affinities?

the answer would be a

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

1.solid

2.carbon dioxide

3.helium