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Element 100 - Fermium (Fm) sound

After Enrico Fermi; discovered 1953. Fermium, like einsteinium, was first isolated from the debris of the 1952 H-bomb test, having been produced from the fission of uranium. Because of its short life-span, scientists doubt that enough fermium will ever be obtained to be weighed.

Properties

Atomic Number: 100
Atomic Weight: (257)
Electron Configuration (at ground state): 1s22s22p63s23p63d104s24p64d105s25p64f145d105f126s26p67s2
Oxidation States (Bold most stable): +3
Melting Point (K): 1800
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: 255 -- 20.1 hours -- alpha particle emission
257 -- 100.5 days -- alpha particle emission
First Ionization Potential (V): 6.50
Electronegativity (Pauling's): 1.3
Thermal Conductivity (at 300K -- W m-1 K-1): 10