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Earth was once almost covered with water. Where are all of the Hydrogen and oxygen atoms now from that water?

April 26, 2017atoms Covered earth Hydrogen oxygen physical Physics sciences water

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Earth was once almost covered with water. Where are all of the Hydrogen and oxygen atoms now from that water?

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The earth is still very well covered in water. It would not take more water to cover the whole earth, just a rearrangement of the earth. If you put the continents into the deepest holes in the oceans, the water would rise up and cover them without needing a single more atom of hydrogen or oxygen.