ChemistryMedium127×since 2002Q1544Ce+3, La+3, Pm+3 C{e^{ + 3}},\,\,L{a^{ + 3}},\,\,P{m^{ + 3}}\,\,Ce+3,La+3,Pm+3 and Yb+3 Y{b^{ + 3}}\,\,Yb+3 have ionic radial in the increasing order asALa+3 <Ce+3 <Pm+3 <Yb+3L{a^{ + 3}}\,\, < C{e^{ + 3}}\,\, < P{m^{ + 3}}\,\, < Y{b^{ + 3}}La+3<Ce+3<Pm+3<Yb+3BYb+3 <Pm+3 <Ce+3 < La+3Y{b^{ + 3}}\,\, < P{m^{ + 3}}\,\, < C{e^{ + 3}}\,<\,L{a^{ + 3}}Yb+3<Pm+3<Ce+3<La+3CLa+3 =Ce+3 <Pm+3 <Yb+3L{a^{ + 3}}\,\, = C{e^{ + 3}}\,\, < P{m^{ + 3}}\,\, < Y{b^{ + 3}}La+3=Ce+3<Pm+3<Yb+3DYb+3 <Pm+3 <La+3 <Ce+3Y{b^{ + 3}}\,\, < P{m^{ + 3}}\,\, < L{a^{ + 3}}\,\, < C{e^{ + 3}}Yb+3<Pm+3<La+3<Ce+3Check answerSkip