Question

Use Hund's rule to derive the electronic configuration
of Ce 3+ ion. Calculate its magnetic moment on the
basis of spin formula only.​

Answer 1

Answer:

Use Hund's rule to derive the electronic configuration of Ce3+ ion, and calculate its magnetic moment on the basis of 'spin only' formula. ... (iii) Transition metal atoms or ions generally form the complexes with neutral, negative and positive ligands. (iv) Compounds of transition metals are usually coloured

Answer 2

Answer:

Electronic configuration of Ce:

Ce:1s

2

2s

2

2p

6

3s

2

3p

6

3d

10

4s

2

4p

6

4d

10

5s

2

5p

6

4f

1

5d

1

6s

2

∴ Electronic configuration of Ce

+3

using hund's rule is,

Ce

3+

:1s

2

2s

2

2p

6

3s

2

3p

6

3d

10

4s

2

4p

6

4d

10

5s

2

5p

6

4f

1

or, Ce

3+

:

54

[Xe]4f

1

No. of unpaired electrons in Ce

+3

=1=n

∴ Magnetic moment, μ=

n(n+2)

B.M

⟹μ=

1(1+2)

B.M

⟹μ=

3

B.M

⟹μ=1.73 B.M