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84
Po
209
Polonium |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Polonium | Symbol: Po |
| Group: Metal, Chalcogen | Atomic weight: 209 |
| Density @ 293 K: 9.4 g/cm3 | Atomic volume: 22.23 cm3/mol |
| Group: Metal, Chalcogen | Discovered: 1898 |
States
| State (s, l, g): solid | |
| Melting point: 527.2 K | Boiling point: 1235 K |
| Heat of fusion: ? | Heat of vaporization: ? |
Energies
| 1st ionization energy: 812 kJ/mole | |
| Electronegativity: 2 | 2nd ionization energy: kJ/mole |
| Electron affinity: 180 kJ/mole | 3rd ionization energy: kJ/mole |
| Specific heat: 0.12 J/gK | Heat atomization: 144 kJ/mole atoms |
Oxidation & Electrons
| Shells: 2,8,18,32,18,6 | Electron configuration: [Xe] 4f14 5d10 6s2 6p4 |
| Minimum oxidation number: -2 | Maximum oxidation number: 6 |
| Min. common oxidation no.: -2 | Max. common oxidation no.: 4 |
Appearance & Characteristics
| Structure: special: simple cubic | Color: blue glow |
| Uses: thermoelectric power | Toxicity: |
| Hardness: mohs | Characteristics: Radioactive; 2 forms |
Reactions
| Reaction with air: mild, => PoO2 | |
| Reaction with 6 M HCl: mild, => PoCl2 | Reaction with 6 M HCl: mild, => PoCl2 |
| Reaction with 15 M HNO3: | Reaction with 6 M NaOH: |
Other Forms
| Number of isotopes: 1 | Hydride(s): |
| Oxide(s): PoO PoO2 | Chloride(s): PoCl2 PoCl4 |
Radius
| Ionic radius (2- ion): pm | Ionic radius (1- ion): pm |
| Atomic radius: 168 pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): pm | Ionic radius (3+ ion): pm |
Conductivity
| Thermal conductivity: J/m-sec-deg | |
| Electrical conductivity: 1/mohm-cm | Polarizability: 6.8 A^3 |
Abundance
| Source: pitchblende, synthetic | |
| Rel. abund. solar system: log | Abundance earth's crust: -9.7 log |
| cost, pure: $/100g | cost, bulk: $/100g |
