Fermij
100
Fm
Skupina
n/a
Perioda
7
Blok
f
Protoni
Elektroni
Neutroni
100
100
157
Opća svojstva
Atomski broj
100
Relativna atomska masa
[257]
Maseni broj
257
Kategorija
Aktinoidi
Boja
n/a
Radioaktivan
Da
Imenovan po Nobelovcu Enricu Fermiju, jednom od pionira nuklearne fizike
Kristalna struktura
n/a
Povijest
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.
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.
Elektrona po ljusci
2, 8, 18, 32, 30, 8, 2
Elektronska konfiguracija
[Rn] 5f12 7s2
Sixteen isotopes of fermium are known to exist
Fizikalna svojstva
Agregacijsko stanje
Čvrsto
Gustoća
-
Talište
1800,15 K | 1527 °C | 2780,6 °F
Vrelište
-
Toplina taljenja
n/a
Toplina isparavanja
n/a
Specifični toplinski kapacitet
-
Zastupljenost u Zemljinoj kori
n/a
Zastupljenost u svemiru
n/a
Izvor slike: Wikimedia Commons (National Nuclear Security Administration)
Fermium was first observed in the fallout from the Ivy Mike nuclear test
CAS broj
7440-72-4
PubChem CID broj
n/a
Atomska svojstva
Atomski radijus
-
Kovalentni radijus
-
Elektronegativnost
1,3 (Paulingova ljestvica)
Potencijal ionizacije
6,5 eV
Atomski volumen
29,1 cm3/mol
Toplinska vodljivost
0,1 W/cm·K
Stanja oksidacije
2, 3
Primjene
Fermium is used for scientific research purposes only.
Fermium is harmful due to its radioactivity
Izotopi
Stabilni izotopi
-Nestabilni izotopi
241Fm, 242Fm, 243Fm, 244Fm, 245Fm, 246Fm, 247Fm, 248Fm, 249Fm, 250Fm, 251Fm, 252Fm, 253Fm, 254Fm, 255Fm, 256Fm, 257Fm, 258Fm, 259Fm, 260Fm