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Hydrogen and Carbon - as the name suggests! They are made up of just hydrogen and carbon atoms. Hydrocarbons in fossil fuels come from the organic matter of organisms which lived 300 million years ago under conditions of extreme pressure and temperature.

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8y ago
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14y ago

Hydrocarbons contains atoms of Hydrogen, Oxygen and Carbon, other atoms may also be present.

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13y ago

Hydrogen and carbon.

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9y ago

hydrogen and carbon

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9y ago

These atoms are carbon and hydrogen.

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11y ago

carbons

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Q: What are the elements that hydrocarbons are made up of?
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