Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Britannica Sources used in this answer

What is the electron configuration of chlorine?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
A labeled diagram of the chlorine element from the periodic table shows its atomic number 17, symbol Cl, electron configuration, and atomic weight range. The box is shaded green to indicate chlorine is a halogen, with icons for orthorhombic crystal structure, gas state at room temperature, and strong acidity. A key explains the icons and colors used.
chlorine Properties of chlorine.

The electron configuration of chlorine, which has an atomic number of 17, is 1s²2s²2p⁶3s²3p⁵.1

This arrangement indicates that chlorine has electrons occupying three electron shells, with seven electrons in its outermost shell.12