Amerisium

95
Am
Golongan
n/a
Periode
7
Blok
f
Proton
Elektron
Neutron
95
95
148
Sifat Umum
Nomor atom
95
Massa atom
[243]
Nomor massa
243
Kategori
Aktinida
Warna
Perak
Radioaktif
Ya
Named after America
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 32, 25, 8, 2
Konfigurasi elektron
[Rn] 5f7 7s2
Am
Americium often enters landfills from discarded smoke detectors
Sifat Fisika
Fase
Solid
Kepadatan
13,69 g/cm3
Titik lebur
1449,15 K | 1176 °C | 2148,8 °F
Titik didih
2880,15 K | 2607 °C | 4724,6 °F
Kalor peleburan
n/a
Kalor penguapan
n/a
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
A
Kredit Gambar: Wikimedia Commons (Bionerd)
A small disc of Am-241 under the microscope
Nomor CAS
7440-35-9
PubChem CID Number
n/a
Sifat Atom
Jari-jari atom
173 pm
Jari-jari kovalen
180 pm
Elektronegativitas
1,3 (Skala Pauling)
Potensi Ionisasi
5,9738 eV
Volume atom
17,78 cm3/mol
Kondusivitas termal
0,1 W/cm·K
Bilangan oksidasi
2, 3, 4, 5, 6
Aplikasi
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 is harmful due to its radioactivity
Isotop
Isotop stabil
-
Isotop tidak stabil
229Am, 231Am, 232Am, 233Am, 234Am, 235Am, 236Am, 237Am, 238Am, 239Am, 240Am, 241Am, 242Am, 243Am, 244Am, 245Am, 246Am, 247Am, 248Am, 249Am