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What is the second most abundant element in the earth’s atmosphere?

Answer:

OXYGEN

Oxygen is the second most abundant element in the Earth comprising 21 percent of the atmosphere as O2 and the rest is tied up in oxides of other elements like hydrogen and iron. Magnesium is the third-most-commonly-used structural metal, following iron and aluminium.

Science Added May 21st, 2019 by EZ Profile Picture EZ

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