Explanatory notes
… cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium). The heading … . (a) Oxides and hydroxides . Ceric oxide, a white powder insoluble in water, is obtained from cerium nitrate; it is …