Chlorine.

Chlorine was said to be discovered in 1744. The discoverers were Carl Wilhelm who prepared it in Sweden and Sir Humphry Davey in UK in the 1800's. Chlorine is the 17th element and it's atomic number is of course 17 and it's symbol is very similar to it because it is Cl which is the first two letters of the word. It also is made up of 18 neautrons. There is alot of history that goes back to 1744 and here is just a little of it. Of course Carl Wilhelm who was the discoverer of Chlorine got most of the information that we have today about chlorine, but some of the things you might not know are that Carl thought that chlorine was a hydrocholic acid. He would heat hydrochloric and maganese dioixide then he produced a greenish yellowish gas and he wasn't sure if it was chlorine yet. Finally the name chlorine got it's name and symbol from the greek word chloros, which means pail green. More information about chlorine that you might not know is that it was used in World War I. How this is possible is that they would use it as a poison and put it on the battle feilds, which later they would egnite on fire. You may have also heard of the gas mustard gas and chlorine was the beginning of mustard gas also.

Now a days chlorine is still helpful in our lives, but in much different ways. Did you know that some of the things that include chlorine is salt it actually uses two elements chlorine and sodium. If you like to swim then you might know that most swimming pools are filled with chlorine to keep it clean.

Above to the right is a picture of chlorine's atomic number, symbol, and, mass number. Hopefyully that gives you a good example of what chlorine is on the periodic table. Hope you have learned as much as I have about chlorine's history, what it is used for, and all of it's atomic number and other things.