Americij
95
Am
Skupina
n/a
Perioda
7
Blok
f
Protons
Electrons
Neutrons
95
95
148
General Properties
Vrstno število
95
Atomska teža
[243]
Mass Number
243
Kategorija
Aktinoidi
Barva
Silver
Radioactive
Da
Named after America
Kristalna struktura
Heksagonalna
Zgodovina
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.
Electrons per shell
2, 8, 18, 32, 25, 8, 2
Razporeditev elektronov
[Rn] 5f7 7s2
Americium often enters landfills from discarded smoke detectors
Physical Properties
Faza snovi
Trdnina
Gostota
13,69 g/cm3
Tališče
1449,15 K | 1176 °C | 2148,8 °F
Vrelišče
2880,15 K | 2607 °C | 4724,6 °F
Talilna toplota
n/a
Izparilna toplota
n/a
Toplotna kapaciteta
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
CAS Number
7440-35-9
PubChem CID Number
n/a
Atomic Properties
Atomski polmer
173 pm
Kovalentni polmer
180 pm
Elektronegativnost
1,3 (Paulingova lestvica)
Ionization Potential
5,9738 eV
Atomic Volume
17,78 cm3/mol
Toplotna prevodnost
0,1 W/cm·K
Oksidacijska stanja
2, 3, 4, 5, 6
Applications
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
Isotopes
Stable Isotopes
-Unstable Isotopes
229Am, 231Am, 232Am, 233Am, 234Am, 235Am, 236Am, 237Am, 238Am, 239Am, 240Am, 241Am, 242Am, 243Am, 244Am, 245Am, 246Am, 247Am, 248Am, 249Am