What is the most common element on Earth, accounting for 36% of its mass?

elburcher

On earth, oxygen is the most common element, making up about 47% of the earth's mass. Silicon is second, making up 28%, followed by aluminum (8%), iron (5%), magnesium (2%), calcium (4%), sodium (3%), and potassium (3%). All of the remaining elements together make up less than 1% of the earth's mass. http://antoine.frostburg.edu/chem/senese/101/periodic/faq/what-element-is-most-abundant.shtml Aug 25 06, 8:52 AM

zbeckabee

Oxygen 46.6 Silicon 27.7 Aluminum 8.1 Iron 5.0 Calcium 3.6 Potassium 2.6 Magnesium 2.6 etc. http://www.esse.ou.edu/fund_concepts/Fundamental_Concepts1/Elements/Relative_Abundance.html#Big_Eight Aug 26 06, 9:32 AM

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After oxygen, what is the most abundant element in the Earth's crust? What is the rarest element on Earth? Which species of creature can carry the most weight in relation to its body mass? What is the least abundant element on the earth's atmosphere?

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