Fermium

Symbol FmAtomic number 100...
Atomic mass
257
Thermal conductivity
0.1
Atomic radius
...
Covalent radius
...
Density
...
Atomic volume
...
Melting point
...
Oxidation states
...
Boiling point
...
Stable isotopes
0
Heat of vapor.
...
Electronegativity
1.3
Heat of fusion
...
First ionization
6.5
Specific heat
...
Electrical conduct.
...
Electron configuration

General descriptionNuclear data
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Einsteinium

Named in honor of Albert Einstein, this element was discovered in 1952 in the debris produced by a thermonuclear explosion . The isotope first identified had an atomic mass of 253 and a half-life of 20 days. Subsequently, a relatively long-lived isotope, einsteinium-254, was prepared by irradiating plutonium in a nuclear reactor

Atomic dataNuclear data
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Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 29
 
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Fermium Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
100
253
253.075173
235.6888
1893.8
1/2
...
3.0d
EC,a
0.33,7.20
100
257
257.095099
239.4334
1907.5
9/2
...
100.5d
a
6.86
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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