Symbol: Cl

Atomic Number: 17

Atomic Weight: 35.453

Chlorine (Cl, atomic number 17) is a halogen element, poisonous greenish-yellow gas. Occurs widely in nature as sodium chloride in seawater, but it can be very dangerous depending on how it is used. It is most frequently found as chloride, as in sodium chloride, another name for your everyday table salt. The chloride ion itself is part of the salt in the earth and in the oceans. In fact, almost 2 percent of the seawater mass is made of chloride ions, and even more than that in the Dead Sea, which we all know is extremely salty. With close to...Read More