Фермиум

100
Fm
Група
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Периода
7
блок
f
Protons
Electrons
Neutrons
100
100
157
Општи Својства
Атомски број
100
Атомска тежина
[257]
Mass Number
257
Category
Актиноид
Color
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Radioactive
Да
Named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics
Кристална структура
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History
Fermium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952.

It was identified by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.

The new element was produced by the nuclear fission of 17 neutrons with uranium-238.
Electrons per shell
2, 8, 18, 32, 30, 8, 2
Електронска конфигурација
[Rn] 5f12 7s2
Fm
Sixteen isotopes of fermium are known to exist
Физички Својства
Фаза
Solid
Густина
-
Точка на топење
1800,15 K | 1527 °C | 2780,6 °F
Точка на вриење
-
Топлина на топење
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Топлина на испарување
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Specific Heat Capacity
-
Abundance in Earth's crust
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Abundance in Universe
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Fermium
Кредити на слика: Wikimedia Commons (National Nuclear Security Administration)
Fermium was first observed in the fallout from the Ivy Mike nuclear test
CAS Number
7440-72-4
PubChem CID Number
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Атомски Својства
Атомски полупречник
-
Ковалентен полупречник
-
Електронегативност
1,3 (Полингова скала)
Ionization Potential
6,5 eV
Atomic Volume
29,1 cm3/mol
Thermal Conductivity
0,1 W/cm·K
Oxidation States
2, 3
Applications
Fermium is used for scientific research purposes only.
Fermium is harmful due to its radioactivity
Isotopes
Stable Isotopes
-
Unstable Isotopes
241Fm, 242Fm, 243Fm, 244Fm, 245Fm, 246Fm, 247Fm, 248Fm, 249Fm, 250Fm, 251Fm, 252Fm, 253Fm, 254Fm, 255Fm, 256Fm, 257Fm, 258Fm, 259Fm, 260Fm