84 Po 209
Polonium
POST-TRANSITION METAL
Phase: Solid
Discovered: Pierre Curie
Block: P
Summary
Polonium is a chemical element with symbol Po and atomic number 84, discovered in 1898 by Marie Curie and Pierre Curie. A rare and highly radioactive element with no stable isotopes, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores. Applications of polonium are few.
Appearance: silvery
Source: WikipediaPhysical Properties
Atomic Mass 209 u
Density 9.196 g/cm³
Melting Point 527 K
Boiling Point 1235 K
Molar Heat 26.4 J/(mol·K)
Electron Affinity 136 kJ/mol
Ionization Energies
1st: 812.1 kJ/mol