Hydrogen

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Element

Hydrogen is the first element on the Periodic Table, with an atomic number of 1. In its natural state, it is a colorless, odorless, tasteless gas. It is a very flammable gas. Its low atomic number makes it a very popular component in many reactions and molecules. Its most popular molecule is H2O, or water.

Hydrogen In Halo

Hydrogen is a gas used to fuel some UNSC vehicles, such as the Warthog and Mongoose. There are also Hydrogen barrels in Halo 3.

Trivia

• Hydrogen gas was used in the famous blimp, the Hindenburg. In 1937 it caught fire, a mystery to this day, but the hydrogen gas has been blamed by many for its flammability.