Name the four quantum numbers and explain them
Tell how to find them
Answers
✻ Quantum Numbers ✻
1) Principal quantum number
2) Azimuthal quantum number
3) Magnetic quantum number
4) Spin quantum number
✻ Principal quantum number (n)✻
Principal quantum number can be found by finding at which orbital it is present. For example :-
Consider the element Sodium.
Its electronic configuration can be written as :
Na - 1 2 2 3
Here, the number present in the last shell will be the principal quantum number.
Thus, Principal quantum number for sodium is 3.
✻ Azimuthal quantum number (l)✻
Let us consider the same example sodium.
Azimuthal quantum number can be found out by seeing in which orbital it is present.
s - Azimuthal quantum number is 0
p - Azimuthal quantum number is 1
d - Azimuthal quantum number is 2
f - Azimuthal quantum number is 3
Sodium, last orbital is s. So, its Azimuthal quantum number wil be 0.
✻ Magnetic quantum number (m)✻
Magnetic quantum number can be any number between +l and -l. That is ranging from positive of Azimuthal quantum number to negative of it.
Here,in the case of sodium, only one value exists i e 0.Thus, Magnetic quantum number of sodium is 0.
✻ Spin quantum number (s)✻
This quantum can have value on and . Thus cannot be determined by any method.