Americium
95
Am
Groep
n.v.t.
Periode
7
Blok
f
Protonen
Elektronen
Neutronen
95
95
148
Algemene Eigenschappen
Atoomnummer
95
Atomair gewicht
[243]
Massa Getal
243
Categorie
Actiniden
Kleur
Zilver
Radioactief
Ja
Named after America
Kristalstructuur
Eenvoudige Hexagonaal
Historie
Americium-241 was first identified in 1944 by Glenn T. Seaborg, Ralph A. James, Leon O. Morgan and Albert Ghiorso at the metallurgical laboratory at the University of Chicago.
It was produced by irradiating plutonium with neutrons during the Manhattan Project.
Americium was first isolated as a pure compound by Burris Cunningham in 1945, at the University of Chicago.
It was produced by irradiating plutonium with neutrons during the Manhattan Project.
Americium was first isolated as a pure compound by Burris Cunningham in 1945, at the University of Chicago.
Eletronen per schil
2, 8, 18, 32, 25, 8, 2
Electronconfiguratie
[Rn] 5f7 7s2
Americium often enters landfills from discarded smoke detectors
Fysieke Eigenschappen
Fase
Vast
Dichtheid
13,69 g/cm3
Smeltpunt
1449,15 K | 1176 °C | 2148,8 °F
Kookpunt
2880,15 K | 2607 °C | 4724,6 °F
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 (Bionerd)
A small disc of Am-241 under the microscope
CAS-nummer
7440-35-9
PubChem CID nummer
n.v.t.
Atoomeigenschappen
Atoomstraal
173 pm
Covalentiestraal
180 pm
Electronegativiteit
1,3 (Pauling schaal)
Ionisatiepotentiaal
5,9738 eV
Atoomvolume
17,78 cm3/mol
Thermische geleiding
0,1 W/cm·K
Oxidatietoestanden
2, 3, 4, 5, 6
Toepassingen
Americium is used in commercial ionization chamber smoke detectors, as well as in neutron sources and industrial gauges.
Americium-241 has been used as a portable source of both gamma rays and alpha particles for a number of medical and industrial uses.
It is also used as a target material in nuclear research to make even heavier elements.
Americium-241 has been used as a portable source of both gamma rays and alpha particles for a number of medical and industrial uses.
It is also used as a target material in nuclear research to make even heavier elements.
Americium is harmful due to its radioactivity
Isotopen
Stabiele isotopen
-Instabiele isotopen
229Am, 231Am, 232Am, 233Am, 234Am, 235Am, 236Am, 237Am, 238Am, 239Am, 240Am, 241Am, 242Am, 243Am, 244Am, 245Am, 246Am, 247Am, 248Am, 249Am