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The element hydrogen is the lightest of all elements and is not normally found in an uncombined state on the earth, but is found in a number of compounds. Due to this hydrogen must be purified for our usage. Hydrogen is used in many different ways in today‘s society but must be used with caution due to its flammability. Hydrogen is thus called because water is generated, or born, by the combustion of hydrogen. Hydrogen’s physical state is that of a gas. Though hydrogen is rarely found free in nature it is present in a large amount of compounds. Hydrogen is found in oil and gas wells, ear