Hydrogen, carbon, water
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hydrogen is a gas
carbon is also a gas
water is a substance that have no colour and shape
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Hydrogen : Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element in the periodic table. At standard conditions hydrogen is a gas of diatomic molecules having the formula H2. It is colorless, odorless, non-toxic, and highly combustible
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