Cl-35

=**Salma S **= media type="file" key="SS_Chlorine.wmv" width="300" height="300"
 * Chlorine **
 * The element I researched was Chlorine. Its element symbol is Cl, and its atomic number is 17. The atomic mass of Chlorine is 35. The density is 3.214 grams per cm3. This means it would sink in water. There are 17 protons, 17 electrons, and 18 neutrons in Chlorine. Some uses of Chlorine are water purification and bleaches. It was discovered by Carl Wilhelm Scheele, and it is a halogen. There are five halogens, and they are metallic elements found in group 17 of the periodic table. All halogens exist at room temperature. **