Fermium
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Fermium is a synthetic chemical element, having the chemical symbol Fm.
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Its atomic number (the number of protons) is 100. It has a Standard Atomic Weight of 257 , and is typically found as a solid in its elemental form.
Named for Enrico Fermi, fermium was first identified in 1952, by Ghiorso and coworkers in the debris from a nuclear explosion in the Pacific.[1]