Cerium, as noted in Applying Chemical Principles 22 3 The Rare Earths, is a relatively abundant lanthanide element that has some important uses Cerium(IV) oxide, CeO 2 , is widely used as a polishing agent for glass Cerium(III) sulfide, Ce 2 S 3 , is becoming more widely used as a red pigment to re...

a Electron configurations for Ce Ce3 and Ce4 using the noble gas notation Ce Xe4f25d06s2 Ce3 Xe4f15d ...

Cerium, as noted in Applying Chemical Principles: 22.3 The Rare Earths, is a relatively abundant lanthanide element

Question:

Cerium, as noted in Applying Chemical Principles: 22.3 The Rare Earths, is a relatively abundant lanthanide element that has some important uses. Cerium(IV) oxide, CeO₂, is widely used as a polishing agent for glass. Cerium(III) sulfide, Ce₂S₃, is becoming more widely used as a red pigment to replace cadmium pigments, which are environmentally less desirable.
(a) Give the electron configurations (using the noble gas notation) for Ce, Ce³⁺, and Ce⁴⁺.
(b) Is either Ce³⁺ or Ce⁴⁺ paramagnetic? If so, how many unpaired electrons does each have?
(c) The solid state structure for CeO₂ is shown below. Describe the unit cell of the compound. How is this structure related to the formula? CeO Ce4+ -0-