Write four points of distinction between Lanthanoids and Actinoids

Write a point of distinction between a metallic solid and ionic solid other than the metallic lustre.

Give two points of distinction between atom and molecule.

(a) Give three points of difference between lanthanoids and actinoids. (b) Give reason and select on one atom/ion which will exhibit asked property: (i) Sc^(3+) or Cr^(3+) (exhibit diamagnetic behaviour) (ii) Cr or Cu (high melting and boiling point)

Write a point of distinction between a metallic solid and an ionic solid than metallic lustre.

Give two points of distinction between charge and mass.

Write two points of distinction between crystalline and amorphous solids.