Which of the following lanthanide ions do not exhibit color?
A. Lu+3 and Ln+3
B. Lu+2 and Ln+2
C. Ce+3 and Ce+3
D. Pr+4 and Ce+4
Answer:A
Which of the following lanthanide ions do not exhibit color?
A. Lu+3 and Ln+3 B. Lu+2 and Ln+2 C. Ce+3 and Ce+3 D. Pr+4 and Ce+4