Hydrogen - Wikipedia
Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula H 2.It is colorless, odorless, tasteless, non-toxic, and highly combustible.Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all normal matter.
DA: 45 PA: 93 MOZ Rank: 22