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The two most common are hydrogen (90%), helium (9%) and the rest make up the final 1%

The oceans are 1/3 hydrogen, we have relatively little hydrogen on the inner planets because the sun's radiation "blew" most of it (the lightest element) to the outer planets like Jupiter, which is made mostly of hydrogen and is more massive than all of the other planets combined.

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16y ago
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12y ago

The first elements were the lightest elements (grouping isotopes together):

  1. Hydrogen, Deuterium, Tritium
  2. Helium
  3. Lithium
  4. Berylium
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Q: What are the four most common elements found in your solar system?
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