Which of the following elements have half-filled f-orbitals in their ground state? (Given : atomic number $\mathrm{Sm}=62 ; \mathrm{Eu}=63 ; \mathrm{Tb}=65 ; \mathrm{Gd}=64, \mathrm{Pm}=61$ ) A. $\mathrm{Sm}$ B. Eu C. $\mathrm{Tb}$ D. Gd E. $\mathrm{Pm}$ Choose the correct answer from the options given below :

Question

Which of the following elements have half-filled f-orbitals in their ground state?

(Given : atomic number $\mathrm{Sm}=62 ; \mathrm{Eu}=63 ; \mathrm{Tb}=65 ; \mathrm{Gd}=64, \mathrm{Pm}=61$ )

A. $\mathrm{Sm}$

B. Eu

C. $\mathrm{Tb}$

D. Gd

E. $\mathrm{Pm}$

Choose the correct answer from the options given below :

B and D only

A and $B$ only

$C$ and $\mathrm{D}$ only

A and E only

Solution

Please login to view the detailed solution steps...

Go to DASH