Poloniu
84
Po
Grupă
16
Perioadă
6
Bloc
p
Protoni
Electroni
Neutroni
84
84
126
Proprietăți Generale
Număr atomic
84
Masă atomică
[210]
Numar de masa
210
Categorie
Metaloid
Culoare
Argint
Radioactive
Da
Numit după Polonia, țara natală a Madam Curie
Structură cristalină
Sistemul Cubic
Istoric
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.
Electroni pe nivelul de energie
2, 8, 18, 32, 18, 6
Configurație electronică
[Xe] 4f14 5d10 6s2 6p4
Polonium is obtained by irradiating bismuth with high-energy neutrons or protons
Proprietăți Fizice
Fază
Solid
Densitate
9,196 g/cm3
Punct de topire
527,15 K | 254 °C | 489,2 °F
Punct de fierbere
1235,15 K | 962 °C | 1763,6 °F
Energie de fuziune
13 kJ/mol
Energie de evaporare
100 kJ/mol
Căldură specifică
-
Abundența în scoarța Pământului
n/a
Abundența în Univers
n/a
Numarul CAS
7440-08-6
Număr CID PubChem
n/a
Proprietăți Atomice
Rază atomică
168 pm
Rază de covalență
140 pm
Electronegativitate
2,00 (Scara lui Pauling)
Potențial de ionizare
8,417 eV
Volum molar
22,23 cm3/mol
Conductivitate termică
0,2 W/cm·K
Număr de oxidare
-2, 2, 4, 6
Aplicații
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
Izotopi stabili
-Izotopi instabili
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