Amerikyum
95
Am
Grup
yok
Periyot
7
Blok
f
Protonlar
Elektronlar
Nötronlar
95
95
148
Temel Özellikleri
Atom numarası
95
Atom ağırlığı
[243]
Kütle Numarası
243
Kategori
Aktinit
Renk
Gümüşi
Radyoaktif
Evet
Named after America
Kristal yapısı
Basit altıgen
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 32, 25, 8, 2
Elektron dizilimi
[Rn] 5f7 7s2
Americium often enters landfills from discarded smoke detectors
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
13,69 g/cm3
Ergime noktası
1449,15 K | 1176 °C | 2148,8 °F
Kaynama noktası
2880,15 K | 2607 °C | 4724,6 °F
Ergime ısısı
yok
Buharlaşma ısısı
yok
Isı kapasitesi
-
Dünya kabuğundaki bulunulabilirliği
yok
Evrendeki bulunulabilirliği
yok
CAS Numarası
7440-35-9
PubChem CID Numarası
yok
Atom Özellikleri
Atom yarıçapı
173 pm
Kovalent yarıçapı
180 pm
Elektronegatifliği
1,3 (Pauling ölçeği)
İyonlaşma enerjisi
5,9738 eV
Atomik Hacim
17,78 cm3/mol
Isıl iletkenlik
0,1 W/cm·K
Yükseltgenme seviyeleri
2, 3, 4, 5, 6
Uygulamalar
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
İzotoplar
Kararlı izotoplar
-Kararsız izotoplar
229Am, 231Am, 232Am, 233Am, 234Am, 235Am, 236Am, 237Am, 238Am, 239Am, 240Am, 241Am, 242Am, 243Am, 244Am, 245Am, 246Am, 247Am, 248Am, 249Am