The Comparative Abundance Of The Elements

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Issue:

Science

 

Written by:

Erin M

 

Date added:

June 3, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

2 / 509

 

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8164 times

 

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The Crust The outside of the earth is a thin crust which is approximately 20 to 40km thick. The crust is a formation of dips and hollows which are filled with water to form the oceans and seas. On top of the earth's crust is an atmosphere, this is a thin layer of gases, 95% of these gases are within the first 20km of the earth's surface...
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Of the 17 elements that make up 99.5%, the most abundant of these are Oxygen 49.2%, Silicon 25%, and Aluminum 7.5%. Then the next most abundant elements are Iron 4.7%, Calcium 3.4%, Sodium 2.6%, Potassium 2.4%, Magnesium 1.9%, Hydrogen 0.9%, titanium 0.6%, Chlorine 0.2%, Phosphorus Manganese and Carbon are all 0...
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