Oxygen
Beginning of paper
about
is a Group 16 element. is the third most abundant
element found in the sun, and it plays a part in the carbon-nitrogen cycle,
one process responsible for stellar energy production. in excited
states is responsible for the bright red and yellow-green colours of the
aurora. The atmosphere o ....
Middle of paper
.... the polar regions and these are increasing
in size annually. Paradoxically, ozone is toxic! Undiluted ozone is bluish
in colour. Liquid ozone is bluish-black, and solid ozone is violet-black.
Oxygen is very reactive and capable of combining with most elements.
It is essential for respiration of all plants and animals and for
practically all combustion.
history of oxygen
Leonardo da Vinci suggested that air consists of at least two
different gases. Before then, air was felt t ....
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Word count: 954
Page count: 4 (approximately 250 words per page)
