Chemistry, asked by DHRUVMAHAJAN3370, 1 year ago

Q. In manganese atom, Mn (Z = 25), the total number of orbitals populated by one or more electrons (in ground state) is:
A. 15
B. 14
C. 12
D. 10

Answers

Answered by QGP
43
The atomic number of Manganese is 25.

The ground state electronic configuration of Mn is:

1s^2 \, \, 2s^2 \, \, 2p^6 \, \, 3s^2 \, \, 3p^6 \, \, 4s^2 \, \, 3d^5


The s subshell has only one orbital. Here Mn has 1s, 2s, 3s and 4s orbitals. All completely filled. So, we have 4 s type orbitals.

The p subshell has three orbitals: p_x \, , \, \, p_y \, \, and \, \, p_z

Mn has 2p and 3p subshells, and both are completely filled.
So, number of p type orbitals is: 2\times 3 = 6

So, there are 6 orbitals of p type.


Now, the d subshell has five orbitals: d_{xy} \, , \, \, d_{yz} \, , \, \, d_{zx} \, , \, \, d_{x^2-y^2} \, \, and \, \, d_{z^2}

In Mn, there are 5 electrons in the 3d subshell. Each of the five d orbitals has one electron.

So, we also add 5 d type orbitals to our count.

__________________________


Finally, we have:

4 (s orbitals) + 6 (p orbitals) + 5 (d orbitals) = 15 orbitals


Thus, there are 15 orbitals in the ground state of Mn which have at least one electron in them.

So, the answer is Option A. 15


Answered by krishna210398
1

Answer:

15

Explanation:

The atomic number of Manganese is  = 25.

to find is the ground state electronic configuration of Mn is:

The  subshell has only one orbital. Here Mn has

1s, 2s, 3s and 4s orbitals. All completely filled.

So, the number of orbitals  4 s type orbitals.

The  subshell has three orbitals:

Mn has 2p and 3p subshells, and both are completely filled.

So, number of p type orbitals is 6 orbitals of p type.

but when , the  subshell has five orbitals:

In Mn, there are 5 electrons in the 3d subshell. Each of the five d orbitals has one electron.

So, we also add 5 d type orbitals to our count.

hence  we have:

4 (s orbitals) + 6 (p orbitals) + 5 (d orbitals) = 15 orbitals

Therefore, there are 15 orbitals in the ground state of Mn which have at least one electron in them.

#SPJ2

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