Hydrogen has several chemical properties; the molecular weight is 2.01594 grams and the relative density compared to air is 0.0695. Hydrogen's solubility in organic solvents is greater than it is in water. Hydrogen is more flammable than any other substance.
Hydrogen is the first element on the periodic table. Normal conditions render hydrogen colorless and odorless, existing peacefully in the diatonic H-2 state. A hydrogen atom consists of a nucleus with one proton and one electron. With an atomic number of 1 and an atomic weight of 1.00797 g/mol, it comprises one of water's main compounds as well as of all the earth's organic matter.