Chlorine (Cl): Properties, Uses and Facts in 3D
Chlorine is element 17 on the periodic table, a halogen, so it is a nonmetal. At room temperature it is a gas. Open it in the 3D Periodic Table to spin its tile, see its electron shells and read its story.
Explore in 3DChlorine quick facts
| Atomic number | 17 |
|---|---|
| Symbol | Cl |
| Atomic mass | 35.45 |
| Category | Halogen |
| Group and period | Group 17, period 3 |
| Block | p-block |
| State at room temperature | Gas |
| Electron configuration | [Ne] 3s² 3p⁵ |
| Electrons per shell | 2, 8, 7 |
| Discovered | 1774, Scheele |
What is chlorine used for?
- Water purification & disinfection
- PVC plastic production
- Bleach & cleaning products
Interesting facts about chlorine
- Chlorine was the first poison gas used at large scale in WWI (Ypres, 1915)
- A single chlorine atom in the atmosphere can destroy 100,000 ozone molecules
- The human stomach produces hydrochloric acid (HCl) to digest food
Chlorine was discovered in 1774 by Scheele in Sweden.
Where chlorine sits on the periodic table
Chlorine is in group 17, period 3. Tap any element to open its page.
Other halogens
Chlorine questions
What is the atomic number of chlorine?
Chlorine has atomic number 17, so every chlorine atom has 17 protons in its nucleus. Its symbol is Cl and its atomic mass is 35.45.
Is chlorine a metal?
Chlorine is a nonmetal. On the periodic table it is grouped as a halogen, found in group 17, period 3.
What is the electron configuration of chlorine?
The electron configuration of chlorine is [Ne] 3s² 3p⁵. Its electrons sit in 3 shells: 2, 8, 7.
What is chlorine used for?
Chlorine is used for water purification & disinfection, pvc plastic production and bleach & cleaning products.
Who discovered chlorine?
Chlorine was discovered in 1774 by Scheele in Sweden.
The 3D Periodic Table is made by Julian Neagu, a solo founder in London, as part of VisionVix Simulators. It is free to use in the browser on desktop and phone, with no sign-up.