Question on: JAMB Chemistry - 2024
When n = 3, the quantum number of an element is
A
3
B
9
C
18
D
21
Ask EduPadi AI for a detailed answer
Correct Option: A
When n = 3, this refers to the principal quantum number, which describes the energy level.
The number of orbitals in an energy level is n². Therefore, in the third energy level (n=3), there are 3² = 9 orbitals.
Each orbital can hold a maximum of 2 electrons, so the total number of electrons in the third energy level is 9 × 2 = 18 electrons.
Add your answer
Please share this, thanks!
No responses