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Answer 1

Answer:

Given ion is Mn2+ with the atomic no. 27.

So, electronic configuration of Mn2+ is [Ar] 3d74s0

[Ar] ↿⇂ ↿ ⇂ ↿ ↿ ↿

3d 4s

No. of unpaired e

−

s =3

So, the spin only magnetic moment is given by,

μ= n(n+2)

= 3(3+2)

= 3X5

= 15

BM=3.87 BM

Answer 2

Answer:

1---

Explanation:

2 -The reason why transition metal in particular are colorful is because they have unfilled or either half filled d orbitals. There is Crystal field theory which explains the splitting of the d orbital, which splits the d orbital to a higher and lower orbital. Now, the electrons of the transition metal can "jump".