Hydrogen, the simplest element, it composed of
             one proton and one electron. It makes up more than 90% of the composition of the universe. More than 30% of the mass of the sun is atomic hydrogen. It is the third most abundant element in the earth's surface, and is found mostly in water. Under ordinary conditions, hydrogen is a colorless, odorless, tasteless, and nonpoisonous gas composed of diatomic molecules. When hydrogen is generated from renewable sources, its production and use is part of a clean, cyclic process.
             Henry Cavendish (1731–1810) was the first chemist to produce water from hydrogen and oxygen and to understand that the production of water was essentially related to the loss of the combined weights of the gases. He was an English chemist and physicist who spent several years studying the properties of hydrogen and carbon dioxide. In 1776 he discovered that hydrogen was a separate substance.
             The ultimate goals of chemists studying Hydrogen are to produce cost-effective hydrogen from renewable energy sources and to make it available for widespread use as a clean energy carrier and fuel. To achieve this, scientists must develop advanced technologies to safely produce, store, transport, use, and detect hydrogen.
             The most abundant element in the universe is Hydrogen and it is also a nonpolluting substance.
             Not to mention, it is an important fuel and energy carrier, now and in the future. Hydrogen is also the lightest element. It is a gas at 298 K, the lightest gas ever known. Hydrogen as water (H2O) is absolutely necessary to life and it is present in all organic compounds. Hydrogen gas was used in lighter-than-air balloons for transport but is far too dangerous because of the fire risk.
             Hydrogen is located in the S-block of the periodic table of elements. It's symbol is "H" and its atomic number is one. Its specific heat capacity is 3.45 and its density is .07
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