Polonium [Po] (CAS-ID: 7440-08-6) locate me
An: 84 N: 125 Am: [209]
Group No: 16 Group Name: Chalcogen
Block: p-block Period: 6
State: solid at 298 K
Colour: silvery Classification: Metallic
Boiling Point: 1235K (962'C)
Melting Point: 527K (254'C)
Density: (alpha) 9.196g/cm3
Density: (beta) 9.398g/cm3
Shell Structure diagrams | Atomic Radius diagram
Isotopes

Discovery Information
Who: Pierre and Marie Curie
When: 1898
Where: France
Name Origin
From Poland, country of Pierre and Marie Curie.
Sources
Occurs in pitchblende from decay of radium.
Uses
Used for nuclear batteries, neutron source, antistatic agents, film cleaner.
Notes
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.
Polonium is highly radioactive and toxic. Weight for weight it is about 2.5 x 1011 times as toxic as hydrocyanic acid (HCN). A milligram of polonium-210 emits as many alpha particles (helium nuclie) as 5 grams of radium. Polonium has been found in tobacco as a contaminant and in uranium ores.
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