Question
Asked Jun 17, 2019
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2. What is the electron configuration of Mn2t?
[Ar]3d
b. [Ar]3d34s2
a.
. [Ar]3d*4s!
d. [Ar]3d 4s2
e. [Ar]3d 4s!
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2. What is the electron configuration of Mn2t? [Ar]3d b. [Ar]3d34s2 a. . [Ar]3d*4s! d. [Ar]3d 4s2 e. [Ar]3d 4s!

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Expert Answer

Step 1

The atomic number of Manganese (Mn) is 25

The electronic configuration of Manganese is 1s22s22p63s23p64s23d5 or [Ar]3d54s2.

Step 2

Mn2+  is formed by the loss of two electrons. Therefore, the number of electrons in Mn2+ ion is 23.

Thus, the electronic configuration of Mn2+ is 1s22s22p63s23p63d5.  This configuration can also be written as or [Ar]3d5.

Step 3

Hence, option (a) is the correct option.

The other option...

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