BOTTOM LINE: What is the most common element on earth?

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s13BOTTOM LINE: What is the most common element on earth? Oxygen.

On planet 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%).

When combined, all of the remaining elements together make up less than 1% of the earth’s total mass.

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