Polonij
84
Po
Skupina
16
Perioda
6
Blok
p
Protoni
Elektroni
Neutroni
84
84
126
Opća svojstva
Atomski broj
84
Relativna atomska masa
[210]
Maseni broj
210
Kategorija
Polumetali
Boja
Srebrna
Radioaktivan
Da
Imenovan po Poljskoj, rodnoj zemlji gospođe Curie
Kristalna struktura
Jednostavna kockasta
Povijest
Polonium was discovered by Marie and Pierre Curie in 1898 in Paris.
This element was the first one discovered by the Curies while they were investigating the cause of pitchblende radioactivity.
The dangers of working with radioactive elements were not known when the Curies made their discoveries.
This element was the first one discovered by the Curies while they were investigating the cause of pitchblende radioactivity.
The dangers of working with radioactive elements were not known when the Curies made their discoveries.
Elektrona po ljusci
2, 8, 18, 32, 18, 6
Elektronska konfiguracija
[Xe] 4f14 5d10 6s2 6p4
Polonium is obtained by irradiating bismuth with high-energy neutrons or protons
Fizikalna svojstva
Agregacijsko stanje
Čvrsto
Gustoća
9,196 g/cm3
Talište
527,15 K | 254 °C | 489,2 °F
Vrelište
1235,15 K | 962 °C | 1763,6 °F
Toplina taljenja
13 kJ/mol
Toplina isparavanja
100 kJ/mol
Specifični toplinski kapacitet
-
Zastupljenost u Zemljinoj kori
n/a
Zastupljenost u svemiru
n/a
CAS broj
7440-08-6
PubChem CID broj
n/a
Atomska svojstva
Atomski radijus
168 pm
Kovalentni radijus
140 pm
Elektronegativnost
2,00 (Paulingova ljestvica)
Potencijal ionizacije
8,417 eV
Atomski volumen
22,23 cm3/mol
Toplinska vodljivost
0,2 W/cm·K
Stanja oksidacije
-2, 2, 4, 6
Primjene
Polonium is used to eliminate static electricity produced during processes such as rolling paper, wire and sheet metal.
Polonium can be mixed or alloyed with beryllium to provide a source of neutrons.
It is also used in anti-static brushes to eliminate dust on photographic film.
Polonium can be mixed or alloyed with beryllium to provide a source of neutrons.
It is also used in anti-static brushes to eliminate dust on photographic film.
Polonium is highly dangerous and radioactive
Izotopi
Stabilni izotopi
-Nestabilni izotopi
188Po, 189Po, 190Po, 191Po, 192Po, 193Po, 194Po, 195Po, 196Po, 197Po, 198Po, 199Po, 200Po, 201Po, 202Po, 203Po, 204Po, 205Po, 206Po, 207Po, 208Po, 209Po, 210Po, 211Po, 212Po, 213Po, 214Po, 215Po, 216Po, 217Po, 218Po, 219Po, 220Po