Chemistry - Complete d-block Question with Solution | TestHub
Which quantam number will be always different for two electrons of .
Options:
Answer:
Solution:
Question Explanation: Identify the quantum number that must be different for the two electrons occupying the same 5s orbital.
Concept: Pauli's exclusion principle.
Solution:
The 5s orbital is a single orbital that can hold a maximum of two electrons. The two electrons in this orbital have the same set of the first three quantum numbers:- Principle Quantum Number (n): 5
- Azimuthal Quantum Number (I): 0 (for s-orbital)
- Magnetic Quantum Number (m1 ) : 0 (for s-orbital)
According to the Pauli exclusion principle, no two electrons in an atom can have all four quantum numbers the same. Therefore, the fourth quantum number, the spin quantum number (m2 ), must be different for the two electrons: one is +1/2 , and the other is -1/2 .
Final Answer: option (D)