84 Po 209
Polonium
post-transition metal
Properties
- Atomic number
- 84
- Atomic mass
- 209 u
- Category
- post-transition metal
- Group
- 16
- Period
- 6
- Block
- p-block
- State (room temp)
- Solid
- Outer-shell electrons
- 6
- Electronegativity
- 2 (Pauling)
- Density
- 9.196 g/cm³
- Melting point
- 253.85 °C
- Boiling point
- 961.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁴
Noble-gas shorthand: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Electrons per shell: 2, 8, 18, 32, 18, 6 — that's 6 in the outermost shell.
About 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.
- Discovered by Pierre Curie
- Appearance: silvery
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.