Fermium

Fermium (₁₀₀Fm)

General properties
Name	fermium
Ancaron Name	zoubmu
Appearance	silvery
Atomic number	100
Standard atomic weight	[260]
Element category	actinide
Group, block	f12
Period	7
Electron Configuration	[Ra] 5f12 7s2
per shell	2, 8, 18, 32, 30, 8, 2
Next element	mendelevium
Previous element	einsteinium
Element above	erbium
Element below	unpentbium
Physical properties
Phase at r.t.	solid
Melting point	852 °C
Boiling point	3015 °C
Density	12.56 g/cc
Crystal structure	hexagonal closed-packed
Magnetic ordering	paramagnetic
Atomic properties
Oxidation states	2, 3
Electronegativity	1.32
Electron affinity	0.31 eV
Ionization energies	1st: 627.4 kJ/mol 2nd: 1224.8 kJ/mol 3rd: 2363.4 kJ/mol
Atomic radius	182 pm
Most stable isotopes
iso NA half-life DM DE (MeV) DP 252Fm syn 25.39 h α 7.153 248Cf 253Fm syn 3.12 d α 7.197 249Cf ε 0.333 253Es 256Fm syn 32.43 h α 7.066 252Cf 257Fm syn 100.7 d α 6.864 253Cf 258Fm trace 64.35 d α 6.702 254Cf 259Fm trace 357.3 d α 6.418 255Cf 260Fm trace 6.38×105 y α 4.471 256Cf 262Fm trace 116.4 d β- 0.973 262Md

Fermium is element number 100 with the symbol Fm. It is a very radioactive metal with no significant uses outside of basic research due to its instability. However it does mark the point at which the dao-based stability effects begin to become significant.