Ionisation enthalpies of Ce, Pr and Nd are higher than those of Th, Pa and U. why ?

Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa and U. Why?

Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa and U. Why ?

Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa and U. Why?

lonisation enthalpies' of Ce, Pr and Nd are higher than Th, Pa and U. Why?

Statement (I) Co^(2+) has higher magnetic moment than Cr^(3+) Statement (II) Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa, U Which of the following is correct ?

The second ionisation enthalpies of both Cr and Cu are higher than those of the next element. Explain.