endrusmith • Joined Tue, Apr 6, 2021 11:22 AM
Hydrogen is a chemical element, which is known to be the lightest element in the periodic table. Hydrogen is the most widely available chemical substance in the universe, constituting roughly 75% of all baryonic mass. Non-remnant stars primarily consist of hydrogen in the plasma state. Protium is the most commonly available isotope of hydrogen, which has one proton and no neutrons. Hydrogen gas was first artificially created in the early 16th century by the reaction of acids on metals. Between 1766 and 1781, Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance and also that it can create water when burned.