Answers

2016-07-31T20:14:42+08:00
Oxygen (O) is the most abundant element, followed by Silicon (Si), Aluminum (Al), Iron (Fe), Calcium (Ca), Sodium (Na), Potassium (K), Magnesium (Mg)
Although there are also other elements present in the Earth's crust, these 8 elements comprises approximately 98% of the earth's surface.
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