KVPY SX SB Exam 2018 Question Paper

Question : 106 of 120

Marks: +1, -0

Among C

e(4\f^1 5d^1 6s^2), Nd(4\f^4 6s^2), Eu(4\f^7 6s^2

) and

Dy(4\f^10 6s^2)

, the elements having highest and lowest 3

^{\rd }

ionization energies, respectively, are

Solution:

After removig 2 electrons in E, it acquires stable half –filled orbital whereas in ce 3

^{\rd}

electron can easily removed from 5d sub-shell.

Go to Question:

Prev Question

Next Question