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    oxygen

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    Oxygen Oxygen 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.Oxygen is one of the must important factors that made it possible for life to exist in this planet. Oxygen is also one of the elements must found in earth. Oxygen can be found in in metals, water, and even the one thin that protects us from the powerful sunrays. Oxygen is a very unstable element, which makes it

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    Oxygen

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    Oxygen Oxygen is the most abundant element on the earth. It makes up 23 percent of air, 89 percent of water, and about 46 percent of crustal rock It also comprises 60 percent of the human body. Oxygen is an essential element for survival. Without it, we would not be here today. In this report, you will learn how oxygen, in its many forms, is very important. Oxygen was first discovered in 1774 by the British chemist Joseph Priestley, when he decomposed mercury II oxide into

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    Oxygen

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    Oxygen content of air Objective: To measure the percent of oxygen in air and the percent of oxygen in an exhale of a breath Hypothesis: Air has more oxygen content in it rather than the exhale of a human breath. Procedure: Wash hands to remove oils Obtain 2 samples of steel wool (.7g each) Expose one sample of the wool to 35mL of vinegar solution for 1 minute Remove the wool from the solution and shake it to remove the vinegar Place the steel wool in a syringe. Put the plunger in the syringe at

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    Oxygen

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    Oxygen Oxygen, symbol O, colorless, odorless, tasteless, slightly magnetic gaseous element. On earth, oxygen is more abundant than any other element. Oxygen was discovered in 1774 by the British chemist Joseph Priestley and, independently, by the Swedish chemist Carl Wilhelm Scheele; it was shown to be an elemental gas by the French chemist Antoine Laurent Lavoisier in his classic experiments on combustion. Large amounts of oxygen are used in high-temperature welding torches, in which a mixture

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    Oxygen

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    Oxygen Systems Knowledge is more important now than ever in using oxygen while flying in General Aviation. New high performance unpressurized aircraft are allowing more pilots to fly in the 10,000-18,000ft altitude range. Most pilots have not received proper training in the physiological effects of flying at those altitudes or the advantages and disadvantages of different oxygen systems available. Recreational pilots are most at risk for having issues using oxygen systems due to the lack of structured

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    Oxygen

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    Oxygen Oxygen and its compounds play a key role in many of the important processes of life and industry. Oxygen in the biosphere is essential in the processes of respiration and metabolism, the means by which animals derive the energy needed to sustain life. Furthermore, oxygen is the most abundant element at the surface of the Earth. In combined form it is found in ores, earths, rocks, and gemstones, as well as in all living organisms. Oxygen is a gaseous chemical element in Group VA of the periodic

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    Oxygen Therapy

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    Oxygen Therapy Oxygen therapy is quickly becoming one of the most controversial, yet effective forms of alternative medicine to enter the medical spotlight as the turn of the millennium approaches. It has many potential uses, ranging from a means of headache relief to a possible cure for AIDS and cancer, and the treatments seem simple and inexpensive. Oxygen therapy, however, remains a sketchy area in the medical community. Despite all the claims that have been made, little evidence has been

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    Scheele and Oxygen

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    Oxygen Vital to life, a necessity to combustion, and the component of innumerable compounds, oxygen is by far one of the most important elements. Astoundingly, Oxygen makes up a fifth of our atmosphere, 49.5% of all compounds on Earth contain oxygen, makes up about 2/3 of our body, yet human kind has only know of it since 1977 (http://pearl1.lanl.gov/periodic/elements/8.html). Ironically, within a period of a couple of years, three different men had stumbled upon the vital element. Carl Wilhelm Scheele

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    Chemistry: The Oxygen Family

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    Also known as the oxygen family, chalcogens are sulfur (S), selenium (Se), tellurium(Te), and polonium (Po). Oxygen (O) is also in group 16, where chalcogens are located on the periodic table. While it is defined as a chalcogen, oxygen and oxides are often separated from chalcogens because its chemical behavior is much different than that of the other elements in the group. The other elements in the group show similar patterns in their electron configurations resulting in similar chemical behavior

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    Oxygen is as important to life in water as it is to life on land. Most aquatic plants and animals require oxygen for survival and the availability of oxygen affects their growth and development. The amount of oxygen found in water is called the dissolved oxygen concentration (DO). DO is a very important measure of the health of a stream--the presence of oxygen in water is a positive sign, the absence of oxygen in the water is often a sign that the stream is polluted. Dissolved oxygen levels vary

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