Crazy Cool Chlorine!

Maryam Khan

Dangerous Yet Kind

Everyone has drank a nice drink of water or swam in a crystal blue pool. But have you ever wondered...How is this water so clean? What causes it? Well the thing that creates this miracle is simply the element of chlorine. But, at the same time it is destructive and has killed many during wars...This is one of the most poisonous things in the world. Chlorine has many different traits. Read to find out more!

Basic Information

. Element- Chlorine

. Symbol- Cl

. Atomic Number- 17

. Atomic Weight - 35.45

. Group - 17

. Period - 3

. Color - Yellowish Green

. Classification - Non-Metallic

What Can We Use it For?

  • It was used as a war gas in 1915.

  • is essential for mammals and plants.

  • Production of safe drinking water everywhere.

  • Chlorine is used in the manufacture of cleaning compounds.

  • Used for bleaching agents, both for industry and for home use.

  • In bleaching, chlorine interacts with oxygen to reduce dyes and pigments.

  • Chlorine forms chlorides, such as sodium chloride,metal and oxygen.These are used for fireworks and the removal of gold from its solid material.

  • Chlorine can form hydrogen chloride. When this dissolves in water, hydrogen chloride forms hydrochloric acid, which is used in the manufacture of metals, foods, plastics, and many other products.

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  • Origin of name= from the Greek word "chloros" meaning "pale green".

  • Discovered it through the reaction of the mineral pyrolusite with hydrochloric acid.

  • Humphry Davy confirmed chlorine to be an element in 1810.

  • Humphry Davy named the element.

  • Chlorine was discovered by Carl William Scheele in 1774 at Sweden.


  • Has the atomic number of 17

  • Chlorine is a greenish yellow gas which combines directly with nearly all elements.

  • Non-metallic element.

  • It’s atomic weight is 35.45


  • Digestive juices in the stomach contain hydrochloric acid.

  • It is in table salt which is something humans eat.


  • It is found mainly as rock salt, carnallite and sylvite.

  • Volcanic gases sometimes contain a small amount of chlorine gas

  • It is not found in a free state in nature, but is found commonly as NaCl (solid or seawater).

  • Chlorine is obtained commercially from salt water by electrolysis


. Is a yellowish green gas

. Has the atomic weight of 35.45

. The state it is found in is a gas

. Chlorine is non-metallic

. 2030 kg is it's density

. -100.98°C is it's melting point

. boiling point of -34.6°C

Fun Facts!

  • Used as a war gas in 1915.

  • The gas irritates the mucous membranes and the liquid burns the skin.

  • not found in a free state in nature

  • Chlorine is found largely in seawater where it exists as sodium chloride

  • Mixing Chlorine with Sodium makes table salt. This is safe to eat.

  • Dangerous separately.

  • The group name that this is a part of is the Halogen group

  • Chlorine is used to clean water and is used in other cleaning products.