list some physical properties of oxygen?
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Oxygen Facts\nAtomic Number  8\nSymbol  O\nAtomic Weight  15.9994 \nDiscovery  Joseph Priestley; Scheele 1774. \nElectron Configuration  [He]2s22p4 \nWord Origin  Greek: oxys: sharp or acid and Greek: genes: born, former... 'acid former'. \nIsotopes  Nine isotopes of oxygen are known. Natural oxygen is a mixture of three isotopes. \nProperties  Oxygen gas is colorless, odorless, and tasteless. The liquid and solid forms are a pale blue color and are strongly paramagnetic. Oxygen supports combustion, combines with most elements, and is a component of hundreds of thousands of organic compounds. Ozone (O3), a highly active compound with a name derived from the Greek word for 'I smell', is formed by the action of an electrical discharge or ultraviolet light on oxygen. \nUses  Oxygen was the atomic weight standard of comparison for the other elements until 1961 when the International Union of Pure and Applied Chemistry adopted carbon 12 as the new basis. It is the third most abundant element found in the sun and the earth, and it plays a part in the carbon-nitrogen cycle. Excited oxygen yields the bright red and yellow-green colors of the Aurora. Oxygen enrichment of steel blast furnaces accounts for the greatest use of the gas. Large quantities are used in making synthesis gas for ammonia, methanol, and ethylene oxide. It is also used as a bleach, for oxidizing oils, for oxy-acetylene welding, and for determining carbon content of steel and organic compounds. Plants and animals require oxygen for respiration. Hospitals frequently prescribe oxygen for patients. Approximately two thirds of the human body and nine tenths of the mass of water is oxygen. \n\nOxygen can exist in a number of physical forms. Most commonly it is found as a diatomic O-O gas and is called molecular oxygen (O2) or dioxygen. The gas exists as a triplet state but the singlet oxygen can also be formed and is more reactive. This gas can be liquefied at low temperatures to produce a blue liquid oxygen (LOX) and cooled further produces a blue solid. After electrical discharge or photolysis Oxygen may also form the triatomic ozone (O3) and under very extreme conditions atomic oxygen (O•) is produced.
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Knowing the number of electrons present in the outer shell and  valence of each oxygen molecule.\n\nBesides there are techniques which actually helps us to visualize electrons like electron density map.\n\nHope this helps.
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Covalent single bonds.\nYou'll find carbon - oxygen\noxygen - hydrogen\ncarbon - hydrogen\ncarbon - carbon
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A paramagnetic substance contains unpaired electrons and tend to move into a magnetic field.\n\nLiquid oxygen does not exist formally with a double bond linking the two oxygens (O=O).  This form only exists at higher temperatures.  When a liquid at -214 to -183oC it exists as a di-radical.  There is a single bond between each oxygen, and each oxygen holds a single electron in its p-orbital.  The presence of these single electrons impart the paramagnetism.\n\nLiquid oxygen is also a pale blue colour due to the unpaired electrons.
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Oxygen = O\nNitrogen = N\nCarbon Dioxide = CO2\n\nThey take up the space that is allowed them by the gravity and temperature of the planet, but oxygen and nitrogen form the main two constituents of the atmosphere.
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Oxygen, Carbon Dioxide, and Water
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carbon, hydrogen and oxygen.
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http://www.webelements.com/webelements/elements/text/O/key.html\nhttp://www.chemicalelements.com/elements/o.html\nhttp://en.wikipedia.org/wiki/Oxygen
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O\n                       ^\n                       |\n                      xx\n                  H-O-Br:->O\n                      xx\n                       |\n                       V\n                       O\n\nPlace the xx above and below Br. Br donates electron pairs to three oxygen atoms. There is also one Br-O-H bond in the molecule.
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Pressure, volume/specific volume, temperature, entropy, enthalpy, specific heat, atomic weight, and thats all I can think of off the top of my head
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Atmosphere\nPascal\nBar\nlbs/cm^2
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Atomic Number of Oxygen is 8,and the atomic weight of Oxygen is 16.00
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a physical property is something you can see or measure.  stuff like temperature, or color.
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Silicon (a metalloid), Oxygen, Hydrogen, Phosphorus
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Chemical properties are properties such as boiling point, freezing point, melting point, electronegativity, flammability, and so forth.  Physical properties are the ones the human senses can pick up with out having to change the chemical, such as taste, smell, sound.
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solid\nliquid\ngas\nplasma
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Characteristics are Mass, Volume, Density and viscosity.\nDensity (rho)=mass/volume