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
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, we have 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:
So, there are 6 orbitals of p type.
Now, 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.
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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
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.
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