84Solid
Po 209 Atomic mass · uMetalloids
Polonium
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.
Discovery 1898 (Pierre Curie)
K2L8M18N32O18P6
Physical properties
Values for the element in its standard state.
- Density
- 9.196g/cm³
- Melting point
- 527K
- Boiling point
- 1,235K
- Atomic radius
- Not available
- Bonding type
- Metallic
- Molar heat
- 26.4J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 10 electrons; 6s, 2 electrons; 6p, 4 electrons;
[Xe] represents 54 core electrons. The full view shows them explicitly.
84 electrons Orbital order preserved from source
- Electronegativity
- 2Pauling scale
- First ionization energy
- 812kJ/mol
- Electron affinity
- 183kJ/mol
- Van der Waals radius
- Not available
Po PoloniumAtomic number 84
812kJ/mol
Atomic numberGaps indicate unavailable data
About polonium
- Appearance
- Silvery
- Discovery
- 1898 (Pierre Curie)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.