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Most common atom in the world?

Updated: 8/11/2023
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15y ago

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"The world" could be taken to mean the universe as a whole or Earth specifically.

The most common atom in the universe is hydrogen.

The most common atom in Earth's crust is oxygen.

Slightly more of the Earth's total mass comes from iron (about 32% iron, 30% oxygen), but since an iron atom is a bit over three times the mass of an oxygen atom, there are still more oxygen atoms than iron atoms in Earth as a whole.

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