Question

Write any four differences between lanthanoids and actinoids.

Answer 1

Lanthanoids                                                                 Actinoids
(a) They are generally                                            They are radioactive.
non-radioactive.
(b) Most of their ions are colourless.                      Coloured ions.
(c) Show + 3, + 4 and + 2 oxidation state.                 

                                                                              Beside + 3, show higher
                                                                               oxidation state.
(d) Less tendency of complex formation. Higher tendency.