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February 22, 2003
Periodic Table on the Web
Chemistry: WebElements Periodic Table
Look up any element :
"Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about about 90% of the universe by weight. Hydrogen as water (H2O) is absolutely essential 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. The lifting agent for the ill fated Hindenberg ballooon was hydrogen rather than the safer helium. "
Posted by daen at February 22, 2003 11:59 PM