Hydrogen is a colorless, odorless, and tasteless gas. It is the lightest element on the periodic table, with an atomic weight of 1.00794.

Hydrogen is the most abundant element in the universe, making up about 75% of all matter. On Earth, hydrogen is found in water, hydrocarbons, and living things.

Hydrogen has a number of unique properties that make it an attractive fuel for a variety of applications. It's extremely light, so it can be used to power vehicles with a very high weight-to-power ratio.

Hydrogen is also non-toxic and produces no emissions when burned, so it's a clean source of energy.

Hydrogen has many uses in industry and commerce. It is used in the production of fertilizers, steel, and aluminum. Hydrogen is also used as a fuel for rockets and is being studied as a potential source of energy for future generations.