Po
Polonium
Element 84 · 208.98243 u
Post-Transition Metal
p-block
Periode 6
Group 16
Solied by RT
Radioaktief
t½ 125.2 years
Dag lengte: →
Polonium is a highly radioactive element discovered by the Curies.
Fisiese eienskappe
| Atomic Mass | 208.98243 u |
| Density | 9.32 g/cm³ |
| Smelt punt: | 527.0 K |
| Boiling Point | 1235.0 K |
| Appearance | Silvery metallic |
| Toestand by kamerkomp | Solied |
Chemical Properties
| Electronegativity | 2.0 (TrinidadCity name (optional, probably does not need a translation)) |
| 1st Ionization Energy | 812.1 kJ/mol |
| Electron Affinity | 183.3 kJ/mol |
| Oxidation States | -2, +2, +4, +6 |
Atomic Properties
| Electron Configuration | [Xe] 4f14 5d10 6s2 6p4 |
| Atomic Radius | 168.0 pm |
| Covalent Radius | 140.0 pm |
| Atomic radius: | 197.0 pm |
Discovery
| Discovered By | Marie Curie, Pierre Curie |
| Discovery Year | 1898 |
| Location | Paris, France |
| Genoemde Na | Named after Poland, the homeland of Marie Curie |
About Polonium
Polonium is extremely radioactive with no stable isotopes. A millionth of a gram can be lethal if ingested. Polonium-210 generates significant heat from alpha radiation.
Gebruiks & Programme
Static eliminators, neutron sources, heat sources for space satellites, and nuclear triggers.
Fun Fact
Polonium-210 was used to assassinate former Russian spy Alexander Litvinenko in London in 2006.
Isotopes
| Definieer Molekulêr Gewigte | Abundance | Half-Life | Stabiel |
| 208 | - | 2.898 years | Nee |
| 209 | - | 125.2 years | Nee |
| 210 | - | 138.376 days | Nee |
Electron Configuration
[Xe] 4f14 5d10 6s2 6p4