What is Chlorine ?

By Anastasiya Koziychuk

What Are Elements?

• Definition: Is one of a class of substances that cannot be separated into simpler substances by chemical means.

• I will be presenting the structure, history, and importance of chlorine.

Chlorine’s Atom

P=17N=18

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What is the structure of Chlorine?

• Description: liquidly, greenish yellowish, and a VERY strong odor

• Number of P, E, N: P=17; E=17; N=18.

• Atomic weight: 35.5• Atomic number: 17 • Symbol: chlorine=Cl

What is the history of Chlorine?

• Discovered in 1774 by Carl Wilhelm Scheele

• Named chlorine by Sir Humphry Davy

• Discovered by treating muriatic acid with manganese dioxide

• First used in World War II to kill

Why is Chlorine important?

• In the past used: to kill, making medicine, and widely used in making everyday products

• Today life uses : disinfecting water, paper products, dye, textiles, petroleum, food, solvents, paints, plastics

• Future prediction of use: to disinfect or clean more things than water

Interesting Facts

• Almost never found alone • Was first used to kill in World War II• Has two founders that got credit for

finding chlorine• Named after Greek word meaning

greenish- yellowish. • Scheele thought Cl contained

oxygen.

Conclusion

• Before I started this project I did not know that chlorine was used to kill people In World War II. I also did not know anything about who discovered it. It was interesting to find out that two scientists discovered it. All I knew before I started to research it was that I swim in it everyday! Oh, and I knew my mom used it to clean my clothes. (with Clorox)

Works Consulted"A Periodic Table of the Elements at Los Alamos National Laboratory." Web. 10 Dec.

2010.

“Elements." Chemical Elements.com - An Interactive Periodic Table of the Elements. Web. 10 Dec. 2010.

"Elements." Current Science. POWER Library. SIRS Discoverer. Web. 10 Dec. 2010.

"It's Elemental - The Periodic Table of Elements." Science Education at Jefferson Lab. Web. 10 Dec. 2010.

Knapp, Brian J., David Woodroffe, and David A. Hardy. Elements. Danbury, CT: Grolier Educational, 2000. Print.

"Periodic Table - Chart of All Chemical Elements." Lenntech. Web. 10 Dec. 2010.

“WebElements.” Periodic Table of the Elements. Web. 10 Dec. 2010.