Jack Dikian
March 2010
The universe as we know it is made up of 91 naturally occurring elements. As of October 2006, we know of 117 elements in total. Some, like silver, gold, and iron have been known for thousands of years. Others, such as darmstadtium and ununquadium have only recently been created synthetically.
Also, we can know approximate the number of atoms in the known universe. This number is:
1,
000,000,000,000,
000,000,000,000,
000,000,000,000,
000,000,000,000,
000,000,000,000,
000,000,000,000
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