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Oxygen

The Element Oxygen

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Transcript of Oxygen

Oxygen
O By: Madalyn Lorber, Sela Kerr, and Rhea Ramsey
Period:5
Grade: 8
Date Presenting: Thursday, May 6
The Basic Facts!
Atomic Mass: 15.9994 AMU
Atomic Number: 8
Nonmetal
In the group Chalcogens
It has 17 isotopes
Melting point: -218.4 Co
Boiling point: -183.0 Co



Oxygen was discovered in 1774 by Joseph Priestly. Other scientists, such as Carl Wilhem Scheele experimented with oxygen.
It comes from the Greek word Oxus, meaning acid, and Jennan, which means generate.
The uses back then, and now, were for breathing, which means that all living things use and breath oxygen!
Physical Properties
Melting point: -218.4 Co
Boiling point: -183.0 Co
Odorless
Not radioactive
If it is cooled below 297o F, oxygen becomes a liquid with a slight blue color.
Chemical Properties
Oxygen reacts with all the Alkali Metals
Oxygen supports combustion, combines with most elements, and is a component of hundreds of thousands of organic compounds.
Non-flammable, but reacts vigorously with combustible materials and can cause fire or explosion.
It combines with elements at room temperature. Ex: Rusting
Uses of Oxygen
Oxygen is used for the human respiratory system, or in other words to breathe, but there are other ways to use it.

Other uses of Oxygen:
. Sewage System cleaning
. Medicines
. Rocket propulsion
. Burning Objects (Fire)
. The ozone layer(which is made up of oxygen) protects us from the suns harmful rays.
It does not mix with other elements to make new substances.


Oxygen is part of the Respiratory Cycle An oxygen tank Interesting Facts about Oxygen

Humans inhale more than 6 billion tones of oxygen each year!
The bright red color of your blood is because of the oxygen attached to your red blood cells. After those red blood cells have released their oxygen and picked up a Carbon Dioxide, your blood turns a dark red.
Joseph Priestly Water (H2O) An Oxygen atom Carl Wihem Scheele
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