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Oxygen Presentation

Marissa Cornelius

on 7 May 2010

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Transcript of Science

Oxygen (O) Marissa Cornelius
Maeliss Gelas
6/8 Science
5/7/2010 Basic Information Chemical symbol: O
Atomic Number: 8
Atomic Mass:15.9994 amu
Classification: Nonmetal
Oygen Group - Group 16
Physical Properties Galore! As a gas, oxygen is colorless, tasteless, and odorless.
As a liquid and solid, oxygen is a pale blue color
Boiling Point: -183 C
Melting point: -218 C
Oxygen has a cubic, crystal structure.

History of Oxygen The name oxygen is Greek for "acid forming". It was actually incorrectly named because a scientist named Antoine Lavoisier believed oxygen was necessary to form all acids, but it was later proven it is not.
Leonardo Da Vinci was the first to suggest that air consisted of two gases.
Prior to 1774, oxygen had been produced by several scientists, but they failed to recognize it as its own element.
The discovery of oxygen is credited to Joseph Priestley in 1774, but Carl Wilhelm Scheele also independently discovered oxygen.
They were able to produce oxygen by heating mercuric oxide. The scientists called the gas they discovered different things. Priestley called it "dephlogisticated air" and Scheele called it more simply, "fire air".
Throughout history, oxygen has been most commonly used for breathing!

Joseph Priestley Carl Scheele
Chemical properties... AND MORE!
Oxygen supports combustion(helps objects burn) and combines with most elements.
Oxygen itself is not flammable.
Oxygen is highly reactive and a powerful reactive agent.
Every element, except fluorine and the noble gases, combines spontaneously at standard temperature and pressure.
It's the essential element in the respiratory process of most living cells.

Modern Uses of Oxygen
Rocket Propulsion
Oxygen Sensors
Oxygen Masks
Oxygen concentrators
Recreational oxygen bars
........BUT IT ALSO SUSTAINS LIFE! 2 Interesting Facts about Oxygen
One interesting use for oxygen in medicine is the
hyperbaric oxygen chamber. This is a device that
treats the body with 100% oxygen at higher than
the normal atmospheric pressure. It increases the
oxygen concentration in all body tissue, stimulates
the growth of new blood vessels, aids the treatment
of infection, and much more! Another interesting use for oxygen is a new fad
called "oxygen bars". These are places where customers
pay on a by-the-minute basis to breathe in a high
concentration of oxygen which will supposedly give you a
"energized and peaceful" feeling. Sometimes scents and
aromatherapy are added to the oxygen to enhance the
experience. The danger of these oxygen bars is often disputed.
Full transcript