Polonium

84
Po
Gruppe
16
Periode
6
Block
p
Protonen
Elektronen
Neutronen
84
84
126
Generelle Eigenschaften
Ordnungszahl
84
Atommasse
[210]
Massenzahl
210
Kategorie
Halbmetalle
Farbe
Silber
Radioaktiv
Ja
Benannt nach Polen, dem Herkunftsland von Madam Curie
Kristallstruktur
Einfach kubisch
Geschichte
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.
Elektronen pro Schale
2, 8, 18, 32, 18, 6
Elektronenkonfiguration
[Xe] 4f14 5d10 6s2 6p4
Po
Polonium is obtained by irradiating bismuth with high-energy neutrons or protons
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
9,196 g/cm3
Schmelzpunkt
527,15 K | 254 °C | 489,2 °F
Siedepunkt
1235,15 K | 962 °C | 1763,6 °F
Schmelzwärme
13 kJ/mol
Verdampfungswärme
100 kJ/mol
Spezifische Wärmekapazität
-
Häufigkeit in der Erdkruste
n/a
Häufigkeit im Universum
n/a
Pierre
Danksagungen für Bilder: hp.ujf.cas.cz
Pierre and Marie Curie in the laboratory
CAS-Nummer
7440-08-6
PubChem CID Number
n/a
Atomeigenschaften
Atomradius
168 pm
Kovalenter Radius
140 pm
Elektronegativität
2,00 (Pauling-Skala)
Ionisierungsenergie
8,417 eV
Molares Volumen
22,23 cm3/mol
Wärmeleitfähigkeit
0,2 W/cm·K
Oxidationszustände
-2, 2, 4, 6
Anwendung
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 is highly dangerous and radioactive
Isotope
Stabile Isotope
-
Instabile Isotope
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