Question

Question #e9093

Answer 1

Cl: [Ne] `3s^2 3p^5`

Explanation:

Chlorine is found on the third row of the periodic table, which is the third energy level n=3.

The closest noble gas that chlorine has passed was Neon, so filling up the orbitals, it fills up the s-orbital, which holds 2 electrons. Then, chlorine is found within the p-orbital and has 5 electrons.

So the shorthand electron configuration is [Ne] `3s^2 3p^5` for chlorine, where the most recent noble gas that was passed is Neon and then followed by the orbitals it has with the number of electrons contained in them.