Question

The pair having the same magnetic moment is: [At. No.: Cr = 24, Mn = 25, Fe = 26, Co = 27]​

Answer 1

Answer:

The pair having the same magnetic moment is

[Cr(H

2

O)

6

]

2+

and [Fe(H

2

O)

6

]

2+

In [Cr(H

2

O)

6

]

2+

, the chromium metal is in +2 oxidation state with 3d

4

outer electronic configuration and 4 unpaired electrons.

In [Fe(H

2

O)

6

]

2+

, the iron metal is in +2

oxidation state with 3d

6

outer electronic configuration and 4 unpaired electrons.

Since both complexes have same number of unpaired electrons, they have the same magnetic moment.

Answer 2

$\dag\:\underline{\sf Question:-}$

The pair having the same magnetic moment is: [Atomic number:: Cr = 24, Mn = 25, Fe = 26, Co = 27]​

$\dag\:\underline{\sf Answer:-}$

[Cr(H₂O)₆]²⁺ and [Fe(H₂O)₆]²⁺

__________________________________________

It can be observed that,

  In [Cr(H₂O₆]²⁺, the Chromium Metal (Cr) is in +2 oxidation state that is, Cr²⁺

Electronic configuration - 3d⁴, Cr it is in Cr²⁺ form.

∴ it has 4 unpaired electrons.

In [Fe(H₂O)₆]²⁺, the Iron(Fe) is in +2 oxidation state that is, Fe²⁺

Electronic configuration - 3d⁶, when Fe is in Fe²⁺ form.

∴ it has 4 unpaired electrons.

Since both complexes have same number of unpaired electrons, they have the same magnetic moment.

Hope this helps! ♡