Planet ELEMENT/COMPOUND
Mercury Sodium (Na)
Venus Sulphuric Acid (H2SO4)
Carbon Dioxide (CO2)
Earth Nitrogen (N)
Mars Iron Oxide (Fe2O3)
Jupiter Hydrogen (H)
Saturn Ammonia (NH3)
Uranus Methane (CH4)
Neptune Helium (He)
Pluto Carbon Monoxide (CO)

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