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Hydrogen has the atomic symbol H and the atomic number of 1. Hydrogen is the most abundant of all the chemical elements, the universe is composed of roughly 75% hydrogen. However naturally occuring elemental hydrogen on [[Earth]] is extremely rare.
[[Composition of the Atom]]
The hydrogen [[atom]] is made up of one proton and one electron with no neutrons.
[[Fuel for Vehicles]]
Hydrogen is the most common thought when it comes to alternative fuels. It is very clean burning, the only by-product of its combustion is pure water. This would slow down the impact that [[global warming]] is having on the Earth. Unfortunatlly there are some set backs. The amount of hydrogen needed to fuel a regular sized car would be extremely large and would not be as convenient as a fuel tank is now. Aydrogen is extremely flammable and the flame is nearly invisible. The chances of a massive fatal explosion in an accident is greater than in one with gas powered veichles.