Fermium
100
Fm
Gruppe
n/a
Periode
7
Blokk
f
Protons
Electrons
Neutrons
100
100
157
Generelle eigenskapar
Atomnummer
100
Atommasse
[257]
Mass Number
257
Kategori
Aktinid
Farge
n/a
Radioactive
Ja
Named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics
Krystallstruktur
n/a
Historie
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.
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.
Elektron per energinivå
2, 8, 18, 32, 30, 8, 2
Elektronkonfigurasjon
[Rn] 5f12 7s2
Sixteen isotopes of fermium are known to exist
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
-
Smeltepunkt
1800,15 K | 1527 °C | 2780,6 °F
Kokepunkt
-
Smeltevarme
n/a
Fordampingsvarme
n/a
Spesifikk varmekapasitet
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Image Credits: 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
n/a
Atom eigenskapar
Atomradius
-
Kovalent radius
-
Elektronegativitet
1,3 (Paulings skala)
Ioniseringspotensial
6,5 eV
Molart volum
29,1 cm3/mol
Termisk konduktivitet
0,1 W/cm·K
Oksidasjonstrinn
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