Day 17 – Chlorine

chemistry-official:

In the third Period and the seventeenth Group, chlorine is everywhere in our lives, and not just in pools! It’s also found in medications and tap water, along thousands of other things.

Chlorine isn’t all good though, when it’s in its gaseous form it can be extremely toxic.

Chlorine was first thought to be a oxygen compound when isolated, and it was a number of years later until they found it was a separate element.

Most poisonous frogs have a chlorine compound in their skin that makes them poisonous, in large doses, even to humans.

Chlorine looks yellowy green when in its gaseous form, and was used for chemical warfare in World War One.