We are being asked to determine the number of electrons in a Cl atom that have an angular momentum quantum number (ℓ) of 0. Let’s first write the electron configuration of a neutral Cl atom.
Neutral element: Atomic number = # protons = # of electrons
• atomic number = 17 (refer to the periodic table)
• # of electrons = 17
• Distribute electrons in the orbitals:
How many electrons in a Cl atom have an angular momentum quantum number of 0?
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