Fermium

Analytical testing dots

Fermium is a synthetic element with the symbol Fm and atomic number 100. A highly radioactive metallic transuranic element of the actinide series, fermium is made by bombarding plutonium with neutrons and is the eighth transuranic element.

 

General
Name, Symbol, Number fermium, Fm, 100
Chemical series actinides
Group, Period, Block n/a, 7, f
Appearance unknown, probably silvery
white or metallic gray
Standard atomic weight (257) g·mol-1
Electrons per shell 2, 8, 18, 32, 30, 8, 2
Physical properties
Phase solid
Melting point 1800K
(1527°C, 2781°F)
Atomic properties
Oxidation states 2, 3
Electronegativity 1.3 (Pauling scale)
Ionization energies 1st: 627 kJ/mol
Miscellaneous
CAS registry number 7440-72-4

 

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Analytical testing dots

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