Halogens+by+Sam+and+Nellie

__media type="youtube" key="cRYLLCebZkU" height="385" width="480" HALOGENS ​ ​__ The halogen family of elements is located on the right side of the peroidic table and is in group 17. The elements are metalloids and non-metals. Astraine is the only metalloid in this family, the rest are non-metals. The reactivity of the elements is relatively low. This family has all of the natural states. Iodine and astraine are solids, bromine is a liquid, flourine and chlorine are gases. All halogens have seven electrons in their outer energy level which gives them an oxidation number of one. Compunds containing halogens are called salts because halogen means salt.

​ ​ __ BROMINE __ (Nellie) ​ ​ Bromine was discovered by Antonie J. Balard in 1826. It has an atomic number of 35 and an atomic mass of 79.904. Bromine has a valence number of seven. The melting point of bromine is -7.2 degrees celsius and a boiling point of 58.78 degrees celsius. Bromine is mostly found in sea water. It can be used as poison and gasoline. Bromine is a redish-brown color. Bromine is poisonous and burns the skin on contact. Flourine and chlorine are more reactive then bromine and bromine is more reactive then iodone. this is because chlorine and flourine are less stable than bromine and bromine is less stable than iodone.



__ CHLORINE __(Sam)

Chlorine was discovered by Carl William Scheele in 1774. It has an atomic number of 17 and an atomic mass of 35.453. The melting point of chlorine is -101.5 degrees celsius and the boiling point is -34.4 degrees celsius. Chlorine has a valence number of one. Chlorine is mustly found in the lithosphere. Chlorine is used to make safe drinking water. It is also used in foods, medicines, and the production of paper products. In a liquid form, chlorine burns the skin. It has a yellow green color. Chlorine got its name from the Greek word khloros, meaning green. If consumed, chlorine will form acids and damage cells in the body on contact. Chlorine in a gas form irritates the mucus membranes. Chlorine does not catch fire very easily. Combining chlorine with other certain substances can make explosive compounds.





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