Po
Polonium[ 209 ]
Polonium was the first element discovered by Marie Sklodowska Curie in 1898, while seeking the cause of radioactivity of pitchblende from Joachimsthal, Bohemia. It required several tonnes of pitchblende to produce very small amounts of polonium.
- Name:Polonium
- Symbol: Po
- Atomic number: 84
- Atomic weight:[ 209 ]
- Standard state: solid at 298 K
- Group in periodic table: 16
- Group name: Halogen
- Period in periodic table: 6
- Block in periodic table: p-block
- Classification: Semi-metallic
- source of neutrons
- thermoelectric power in space satellites
- mixed or alloyed with beryllium
Polonium has more isotopes than any other element, all of which are radioactive. Polonium dissolves readily in dilute acids, but is only slightly soluble in alkalis.