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[[ | [[File:Hydrogen.jpg|thumb|150px|A barrel containing Hydrogen.]] | ||
'''Hydrogen''' is a chemical element with an atomic number of 1; it is the first element in the Periodic Table and is the lightest with a molar mass of 1.00794 g/mol. It has an atomic radius of 78 pm. In its natural diatomic state, it is a colorless, odorless, tasteless gas. It is a very flammable gas and is the lightest element. Its low atomic number makes it a very common component in many reactions and molecules. | '''Hydrogen''' is a chemical element with an atomic number of 1; it is the first element in the Periodic Table and is the lightest with a molar mass of 1.00794 g/mol. It has an atomic radius of 78 pm. In its natural diatomic state, it is a colorless, odorless, tasteless gas. It is a very flammable gas and is the lightest element. Its low atomic number makes it a very common component in many reactions and molecules. | ||