Changes

==Compounds==

==Compounds==

Hydrogen can be found in the vast majority of [[organic]] compounds, as well as many [[inorganic]] compounds.<ref>For example, [[hydrocarbon]]s and metal hydrides, respectively</ref> It is an important component of [[water]] and most [[acid]]s.  

Hydrogen can be found in the vast majority of [[organic]] compounds, as well as many [[inorganic]] compounds.<ref>For example, [[hydrocarbon]]s and metal hydrides, respectively</ref> It is an important component of [[water]] and most [[acid]]s.

 

 

Hydrogen makes up 75% of all matter in the universe by mass. Well over 90% of all atoms in the universe are hydrogen. It is the main element found in [[stars]] and gas-giant (Jovian) planets. Huge clouds of molecular hydrogen are found in interstellar space; most astronomers believe that these clouds are associated with star formation, with the hydrogen providing the raw material and fuel for stars to form. However the timescale required for this to occur is claimed to be around 100,000 years for a star the size of the [[Sun]], which means that the process cannot be observed. For this and other reasons, this hypothesis is generally rejected by Creation scientists.

==Fuel for vehicles==

==Fuel for vehicles==