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Which element is mostly found in earth crust?
10 Most Abundant Elements in the Earth's Crust


Element             Abundance percent by weight   
Oxygen              46.1%   
Silicon               28.2%   
Aluminum           8.23%   
Iron                    5.63%   
Calcium              4.15%   
Sodium               2.36%   
Magnesium         2.33%  
Potassium           2.09%   
Titanium             0.565%  
Hydrogen            0.14%   


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