Einsteinium
99
Es
Groep
n.v.t.
Periode
7
Blok
f
Protonen
Elektronen
Neutronen
99
99
153
Algemene Eigenschappen
Atoomnummer
99
Atomair gewicht
[252]
Massa Getal
252
Categorie
Actiniden
Kleur
n.v.t.
Radioactief
Ja
Named after Albert Einstein
Kristalstructuur
n.v.t.
Historie
Einsteinium 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 explosion in miniscule amounts by the addition of 15 neutrons to 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 explosion in miniscule amounts by the addition of 15 neutrons to uranium-238.
Eletronen per schil
2, 8, 18, 32, 29, 8, 2
Electronconfiguratie
[Rn] 5f11 7s2
Einsteinium is the first divalent metal in the actinide series
Fysieke Eigenschappen
Fase
Vast
Dichtheid
8,84 g/cm3
Smeltpunt
1133,15 K | 860 °C | 1580 °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)
Einsteinium was first observed in the fallout from the Ivy Mike nuclear test
CAS-nummer
7429-92-7
PubChem CID nummer
n.v.t.
Atoomeigenschappen
Atoomstraal
-
Covalentiestraal
-
Electronegativiteit
1,3 (Pauling schaal)
Ionisatiepotentiaal
6,42 eV
Atoomvolume
28,5 cm3/mol
Thermische geleiding
0,1 W/cm·K
Oxidatietoestanden
2, 3
Toepassingen
Einsteinium is mainly used for scientific research purposes.
The rare isotope einsteinium-254 is favored for production of ultraheavy elements.
Einsteinium-254 was used as the calibration marker in the chemical analysis spectrometer of the Surveyor 5 lunar probe.
The rare isotope einsteinium-254 is favored for production of ultraheavy elements.
Einsteinium-254 was used as the calibration marker in the chemical analysis spectrometer of the Surveyor 5 lunar probe.
Einsteinium is harmful due to its radioactivity
Isotopen
Stabiele isotopen
-Instabiele isotopen
240Es, 241Es, 242Es, 243Es, 244Es, 245Es, 246Es, 247Es, 248Es, 249Es, 250Es, 251Es, 252Es, 253Es, 254Es, 255Es, 256Es, 257Es, 258Es