Chemistry Practice Problems Quantum Numbers Practice Problems Solution: What is the maximum number of electrons in an atom...

Solution: What is the maximum number of electrons in an atom that can have the following quantum numbers: n = 3, ms = +1/2 ?(a) 1 (b) 2 (c) 8 (d) 9 (e) 18

Problem

What is the maximum number of electrons in an atom that can have the following quantum numbers: n = 3, ms = +1/2 ?

(a) 1 

(b) 2 

(c) 8 

(d) 9 

(e) 18

Solution

Determine the maximum number of electrons in an atom for the given set of quantum numbers 

To solve this problem, let’s first define and determine the possible values of the four quantum numbers:

principal quantum number (n) →energy level in orbitals and its value could be any positive integer starting from 1 to infinity.

angular momentum quantum number (ℓ)→ (l) has to be at least 1 less than n, range of values from 0 up to (n-1)

▪ Each ℓ value corresponds to a subshell:

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