#84
Polonium
post-transition metal· Solid·209 u
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.
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Identity
- Symbol
- Po
- Atomic Number
- 84
- Atomic Mass
- 209 u
- Category
- post-transition metal
- Block
- p-block
- Period
- 6
- Group
- 16
- Appearance
- silvery
- Year Discovered
- 1898 CE
- Discovered By
- Pierre Curie
- Named By
- Poland
Electrons
- Configuration
- [Xe] 4f14 5d10 6s2 6p4
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p4
- Shells
- 2, 8, 18, 32, 18, 6
- Electronegativity
- 2
- Electron Affinity
- 136
- Oxidation States
- +4, +2
- Ionization Energies
- 812.1
Physical Properties
- State at
- Solid
- Melting Point
- 527
- Boiling Point
- 1235
- Density
- 9.196
- Molar Heat
- 26.4 J/(mol·K)
- Crystal Structure
- Simple Cubic
- Magnetic Ordering
- Diamagnetic
Mechanical
- Covalent Radius
- 140 pm
- Van der Waals
- 197 pm
- Bulk Modulus
- 26 GPa GPa
Thermal & Electrical
- Thermal Conductivity
- 20 W/(m K) W/(m·K)
- Specific Heat
- 125 J/(kg K) J/(g·K)
- Heat of Vaporization
- 102 kJ/mol kJ/mol
- Heat of Fusion
- 13 kJ/mol kJ/mol
Abundance
- Universe
- 0
- Sun
- 0
- Meteorite
- 0
- Earth's Crust
- 2e-7 ppm
- Ocean
- 2e-14 ppm
- Human Body
- 0