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-==Element==
+{{Status|Canon}}
-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.
+{{Wikipedia|Hydrogen}}
+[[File:Hydrogen.jpg|thumb|150px|A barrel containing Hydrogen.]]
+'''Hydrogen''' is a chemical element with an atomic number of 1; it is the first element in the Periodic Table and is the lightest with a molar mass of 1.00794 g/mol. It has an atomic radius of 78 pm. In its natural diatomic state, it is a colorless, odorless, tasteless gas. It is a very flammable gas and is the lightest element. Its low atomic number makes it a very common component in many reactions and molecules.
-==Hydrogen In Halo==
+Hydrogen is the most common element in the entire universe because it makes up almost all stars (the rest of stars' mass is mostly [[helium]]). When purely combusted with oxygen, the (chemical equation 2H<sub>2</sub> + O<sub>2</sub> ---> 2H<sub>2</sub>O) it forms water and heat, a very useful reaction with a clean result.
-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==
+As fossil fuels have largely been abandoned, hydrogen is one of [[human]]ity's current top power sources, commonly used in fuel cells and as fuel in [[Nuclear fusion|fusion reactors]] along with [[deuterium]]. An example of a hydrogen-powered reactor is the [[UNSC Reactor|reactor unit]] used to power [[Firebase|prefabricated bases]].<ref>[http://www.halowars.com/GameInfo/firebase.aspx '''Halowars.com''': ''Firebase'']</ref> Hydrogen gas is also used to fuel some [[United Nations Space Command|UNSC]] [[vehicles]], such as the [[M12 Light Reconnaissance Vehicle|Warthog]] and [[M274 Ultra-Light All-Terrain Vehicle|Mongoose]].<ref>[http://halo.bungie.net/News/content.aspx?type=topnews&link=BAGwarthog '''Bungie.net''': ''The Warthog'']</ref><ref>[http://halo.bungie.net/News/content.aspx?type=topnews&link=BAGMongoose '''Bungie.net''': ''The Mongoose'']</ref>
-*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.
-[[Category:Chemical Compounds]]
+==Sources==
+{{Ref/Sources}}
+[[Category:Elements]]