Fermium

100
Fm
Golongan
n/a
Periode
7
Blok
f
Proton
Elektron
Neutron
100
100
157
Sifat Umum
Nomor atom
100
Massa atom
[257]
Nomor massa
257
Kategori
Aktinida
Warna
n/a
Radioaktif
Ya
Named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics
Struktur kristal
n/a
Sejarah
Fermium 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 fission of 17 neutrons with uranium-238.
Elektron per kulit
2, 8, 18, 32, 30, 8, 2
Konfigurasi elektron
[Rn] 5f12 7s2
Fm
Sixteen isotopes of fermium are known to exist
Sifat Fisika
Fase
Solid
Kepadatan
-
Titik lebur
1800,15 K | 1527 °C | 2780,6 °F
Titik didih
-
Kalor peleburan
n/a
Kalor penguapan
n/a
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
Fermium
Kredit Gambar: Wikimedia Commons (National Nuclear Security Administration)
Fermium was first observed in the fallout from the Ivy Mike nuclear test
Nomor CAS
7440-72-4
PubChem CID Number
n/a
Sifat Atom
Jari-jari atom
-
Jari-jari kovalen
-
Elektronegativitas
1,3 (Skala Pauling)
Potensi Ionisasi
6,5 eV
Volume atom
29,1 cm3/mol
Kondusivitas termal
0,1 W/cm·K
Bilangan oksidasi
2, 3
Aplikasi
Fermium is used for scientific research purposes only.
Fermium is harmful due to its radioactivity
Isotop
Isotop stabil
-
Isotop tidak stabil
241Fm, 242Fm, 243Fm, 244Fm, 245Fm, 246Fm, 247Fm, 248Fm, 249Fm, 250Fm, 251Fm, 252Fm, 253Fm, 254Fm, 255Fm, 256Fm, 257Fm, 258Fm, 259Fm, 260Fm