oxygen :: essays research papers fc

type Otype O Atomic number8Atomic weight15.9994Melting point-218.4oC (-361.1oF) Boiling point-183.0oC (-297.4oF) Density (1 atom, 0oC) 1.429 g/lValence2electronic config.2-6 or 1s22s22p4.type O is one of the must(prenominal) important factors that made it possible for life to exist in this planet. Oxygen is also one of the instalments must found in earth. Oxygen ass be found in in metals, water, and even the one concentrate that protects us from the powerful sunrays. Oxygen is a very unstable element, which makes it aristocratical to make compounds with other elements creating different kinds of solids and liquids. Oxygen is found in the advertize as O2, and found in the ozone as O3. Oxygen is essential to in all planets life.The Discovery of OxygenOn August 1, 1774, Joseph Priestly examined the effect of uttermost(prenominal) heat on mercuric oxide. He noted that an phone line or turgidity was readily expelled from the specimen. To his surprise a sessdle burned in this w ith a remarkably vigorous flame. He called this new substance dephlogisticated shine in terms of the current chemical theory of combustion. When he went to capital of France on 1775 he showed his discovery to Antoine Lavoisier. When Antoine examined the gas he found that dephlogisticated air combined with metals and other substance. Because some of the compounds form acids he called the gas Oxygen form the Greek words for sour and I Produce. Oxygen in the AtmosphereThe Atmosphere surrounding the earth is a mechanical miscellany of gases. The most important of these gases are oxygen, nitrogen, and carbon dioxide. Oxygen is the essential element for life. It is odorless, colorless, tasteless, and slightly heavier than air. The chief commercial source of oxygen is the atmosphere. Oxygen whitethorn be separated from the mixture of gases that make up the atmosphere. This is done by physical means by subjecting air to very high pressures and modest temperatures until a point is reache d where it passes form the gaseous into the liquid state. Than the liquid is forego to some warm, so that nitrogen, which has a lower boiling point therefore oxygen, evaporates off. Oxygen as first prepared by heating sure metals oxides, including mercury oxide. OzoneOzone (O3), named for the Greek word for smell, is a poisonous, colorless and tasteless gas with a distinctive smell. Molecules of ozone are probably the source of the smell that can be detected close to working electrical equipment such as motors and TVs.