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Chlorine - History Of Chlorine, Properties And Uses Of Chlorine, Compounds Of Chlorine

elements metallic halogen water

Chlorine is the non-metallic chemical element of atomic number 17, symbol Cl, atomic weight 35.45, melting point -149.8°F (-101°C), and boiling point -29.02°F (-33.9°C). It consists of two stable isotopes, of mass numbers 35 and 37. Ordinary chlorine is a mixture of 75.77% chlorine-35 atoms and 24.23% chlorine-37 atoms.

Chlorine is a highly poisonous, greenish yellow gas, about two and a half times as dense as air, and with a strong, sharp, choking odor. It was, in fact, one of the first poisonous gases used in warfare—in 1915 during World War I. In spite of its disagreeable nature, there are so many everyday products that contain chlorine or are manufactured through the use of chlorine that it is among the top ten chemicals produced in the United States each year. In 1994, more than 24 billion lb (11 billion kg) of chlorine were produced.

In nature, chlorine is widely distributed over the earth in the form of the salt (sodium chloride) in sea water. At an average concentration of 0.67 oz (19 g) of chlorine in each liter of sea water, it is estimated that there are some 1016 tons of chlorine in the world's oceans. Other compounds of chlorine occur as minerals in the earth's crust, including huge underground deposits of solid sodium chloride.

Along with fluorine, bromine, iodine and astatine, chlorine is a member of the halogen family of elements in group 17 of the periodic table-the most non-metallic (least metallic) and most highly reactive group of elements. Chlorine reacts directly with nearly all other elements; with metals, it forms salts called chlorides. In fact, the name halogen, meaning salt producer, was originally defined for chlorine (in 1811 by J. S. C. Schweigger), and it was later applied to the rest of the elements in this family.


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over 6 years ago

Hey may i ask ?

I need to know what is the chemical Properties of the chlorine??

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over 9 years ago

hey this is a cool thing to study bout .

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about 9 years ago

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over 5 years ago

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almost 9 years ago

good site most of the info i needed cool.

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almost 7 years ago

it helped a lot with my science homework thanks..... RP

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over 6 years ago

how does chlorine disinfect water?

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over 9 years ago

This is really good! this info has helped me alot with my assignment that i have to complete! thx heaps!

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almost 6 years ago

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almost 6 years ago

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about 9 years ago

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almost 7 years ago

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over 7 years ago

hey.. can i ask?

what is the properties of chlorine why it is a disinfectant?

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about 9 years ago

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over 9 years ago

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over 9 years ago

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over 7 years ago

hey! . .ahm, can i ask . .ahm, what property of chlorine that can kill fungi on pears?? . .i need answer ASAP .. . thanks!

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almost 9 years ago

this site really helps thanks. do you have one for boron?

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over 5 years ago

Like it! It helped a lot with my science project..... But it should give more information about its history like it origin of the name and who discovered it

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over 6 years ago

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over 6 years ago

i love chlorine!!!

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almost 7 years ago

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almost 9 years ago

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over 9 years ago

thankyou for the info

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almost 5 years ago

Element name Chlorine
Element Symbol Cl
Atomic Mass 35.453
Atomic Number 17
Protons 17
Neutrons 12
Electrons 17
Boiling Point 239.1 degrees Kelvin
Melting Point 172.17 degrees Kelvin
Density 3.17 Cubic Centimeters
Atomic Volume 22.7 Cubic Centimeters
Stable Isotopes 2
Chlorine State of Matter Gas & Liquid
Group 17 of the Periodic Table of Elements
Period 3 of the Periodic Table of Elements
Chlorine is used to kill bacteria
Name Origin Greek meaning green
Discovered in 1774
Named in 1810
Group Name Halogens







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over 6 years ago

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almost 7 years ago

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over 5 years ago

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almost 6 years ago

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over 2 years ago

i want some question for chlorine gas

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about 5 years ago

how many compounds are in chlorine gas?

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over 5 years ago

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over 2 years ago

This helped me with my homework sooo much. Thank you heaps!!

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about 1 month ago

I very much liked the demonstration of chlorine gas reactivity with various metals. The historical context of past uses of chlorine was fascinating but horrible in war. I am in the water treatment industry and have seen the best application of chlorine in the prevention of illness as a disinfectant in drinking water.

Thank you!

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10 months ago

hi..
chlorine is added into water to destroy bacteria and viruses, so how was this discovered?

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10 months ago

hi..
chlorine is added into water to destroy bacteria and viruses, so how was this discovered?