by: Dakota Moreno
The 4 w's about Chlorine
Chlorine is a naturally-occuring chemical element, it is one of the basic building blocks of matter. Chlorine is an essential nutrient for all plants and animals. Chlorine is never found free in nature, but now chlorine is commonly used as antiseptic which is used to make drinking water safe, treat swimming pools, plastics, medicines, etc. It was found when Carl Wilhelm Scheele combined the mineral pyrolusite with hydrochloric acid in 1774.
The electrons are arranged around the nucleus with a 2-8-7 formation. Three levels are used, the outer level has 7 electrons. Chlorine is less reactive. It's harder to attract and gain an electron the larger the atom is. The more difficult it is to gain the outer electrons, the less reactive it is.
Chlorine is a yellow-green dense gas with a choking smell. Chlorine kills bacteria, about 20% of chlorine is used to make PVC, used in organic chemistry, but also chlorine gas is very poisonous. Its melting point is at -101.5 degrees celsius, and its boiling point is -34.04 degrees celsius. Chlorine is in group 17, in period 3, and in block p.