Fermium
100
Fm
Groep
n.v.t.
Periode
7
Blok
f
Protonen
Elektronen
Neutronen
100
100
157
Algemene Eigenschappen
Atoomnummer
100
Atomair gewicht
[257]
Massa Getal
257
Categorie
Actiniden
Kleur
n.v.t.
Radioactief
Ja
Named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics
Kristalstructuur
n.v.t.
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.
Eletronen per schil
2, 8, 18, 32, 30, 8, 2
Electronconfiguratie
[Rn] 5f12 7s2
Sixteen isotopes of fermium are known to exist
Fysieke Eigenschappen
Fase
Vast
Dichtheid
-
Smeltpunt
1800,15 K | 1527 °C | 2780,6 °F
Kookpunt
-
Fusiewarmte
n.v.t.
Verdampingswarmte
n.v.t.
Specifieke Warmtecapaciteit
-
Overvloedig aanwezig in de aardkorst
n.v.t.
Overvloedig aanwezig in het universum
n.v.t.
Verdiensten voor afbeeldingen: Wikimedia Commons (National Nuclear Security Administration)
Fermium was first observed in the fallout from the Ivy Mike nuclear test
CAS-nummer
7440-72-4
PubChem CID nummer
n.v.t.
Atoomeigenschappen
Atoomstraal
-
Covalentiestraal
-
Electronegativiteit
1,3 (Pauling schaal)
Ionisatiepotentiaal
6,5 eV
Atoomvolume
29,1 cm3/mol
Thermische geleiding
0,1 W/cm·K
Oxidatietoestanden
2, 3
Toepassingen
Fermium is used for scientific research purposes only.
Fermium is harmful due to its radioactivity
Isotopen
Stabiele isotopen
-Instabiele isotopen
241Fm, 242Fm, 243Fm, 244Fm, 245Fm, 246Fm, 247Fm, 248Fm, 249Fm, 250Fm, 251Fm, 252Fm, 253Fm, 254Fm, 255Fm, 256Fm, 257Fm, 258Fm, 259Fm, 260Fm