We are being asked to determine the **maximum number of electrons in** an atom for each set of quantum numbers given. 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**:

How many electrons in an atom can have the n = 5, l = 2 designation?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Quantum Numbers concept. If you need more Quantum Numbers practice, you can also practice Quantum Numbers practice problems.