2. C HLORINE By: Lauren http://www.webelements.com/chlorinehttp://www.webelements.com/chlorine/

3. P HYSICAL P ROPERTIES OF C HLORINE Color: yellowish green Classification: non- metallic, halogen

4. C RYSTAL STRUCTURE Chlorine’s crystal structure is orthorhombic

5. S YMBOL, ATOMIC NUMBER, ATOMIC MASS, NUMBER OF PROTONS, ELECTRONS, NEUTRONS Symbol: Cl Atomic Number: 17 Atomic Mass: 35.4527 Number of protons/ electrons: 17 Neutrons: 18

6. B LOCK, PERIOD, GROUP, ELECTRON CONFIGURATION Block: p-block Period: 3 Group/group name: 17, halogen Electron configuration: [Ne].3s 2.3p 5

7. U SES OF THE ELEMENTS USES OF CHLORINE: Swimming pools Paper products Dye stuffs Textiles Petroleum products Medicines Antiseptics

8. M ORE U SES OF CHLORINE Insecticides Foodstuffs Solvents Paints Plastics And many other consumer products

9. W HERE CHLORINE IS FOUND, IT ’ S ABUNDANCE It is never found in nature. It’s found mainly as rock salt.

10. C HEMICAL P ROPERTIES, REACTIVITY, OXIDATION STATE Some chemical properties of chlorine are: It’s a diatomic molecule It’s highly reactive It combines readily with nearly all elements It’s a member of the salt- forming halogen series It’s oxidation state is Cl −

11. I NTERESTING FACTS ABOUT CHLORINE AND A VIDEO The gas irritates the mucous membranes It was used as a war gas in 1915 1000 ppm can be fatal after a few breaths http://www.youtube.co m/watch?v=Ftw7a5cc ubs Victim of the chlorine gas from the war