JEE Main 20249 Apr, Morning shiftChemistryMediumd- and f-Block Elements158× since 2002Number of colourless lanthanoid ions among the following is __________. Eu3+,Lu3+,Nd3+,La3+,Sm3+\mathrm{Eu}^{3+}, \mathrm{Lu}^{3+}, \mathrm{Nd}^{3+}, \mathrm{La}^{3+}, \mathrm{Sm}^{3+}Eu3+,Lu3+,Nd3+,La3+,Sm3+Your answerType your answer. Integers and decimals are accepted.CheckSkip · show solution
