Which is the noble gas notation for chlorine?

Explanation:

Chlorine's atomic number is 17.

That means that it has 17 protons and 17 electrons.

Then, you have to write the electron configuration for the 17 electrons.

The noble gas notation is a short notation that uses the previous noble gas symbol (closed in brackets) and adds the new electrons, filling the orbitals in increasing order of energy, which  you can remember using Aufbau rules.

Then:

Result: [Ne] 3s² 3p⁵ ← answer

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