We're asked to **determine the possible quantum numbers when n = 1**, let’s first define the possible values of the first three quantum numbers:

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

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

**• magnetic quantum number (mℓ)** **→ **range of values from **-****ℓ**** to +** **ℓ****.**

List all the orbitals in each principal level. Specify the three quantum numbers for each orbital.

n = 1

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