General: |
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Name: Polonium
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Symbol: Po
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Group: Metal, Chalcogen
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Atomic weight: (209)
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Density @ 293 K: 9.4 g/cm3
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Atomic volume: 22.23 cm3/mol
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Group: Metal, Chalcogen
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discovered: 1898
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States: |
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state (s, l, g): s
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melting point: 527.2 K
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boiling point: 1235 K
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Heat of fusion: ?
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Heat of vaporization: ?
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Energies: |
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1st ionization energy: 812 kJ/mole
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electronegativity: 2
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2nd ionization energy: kJ/mole
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electron affinity: 180 kJ/mole
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3rd ionization energy: kJ/mole
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Specific heat: 0.12 J/gK
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heat atomization: 144 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,18,32,18,6
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electron configuration: [Xe] 4f14 5d10 6s2 6p4
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minimum oxidation number: -2
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maximum oxidation number: 6
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min. common oxidation no.: -2
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max. common oxidation no.: 4
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Appearance & Characteristics: |
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structure: special: simple cubic
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color: blue glow
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uses: thermoelectric power
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toxicity:
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hardness: mohs
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characteristics: Radioactive; 2 forms
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Reactions: |
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reaction with air: mild, =>PoO2
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reaction with 6M HCl: mild, =>PoCl2
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reaction with 6M HCl: mild, =>PoCl2
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reaction with 15M HNO3:
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reaction with 6M NaOH:
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Other Forms: |
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number of isotopes: 1
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hydride(s):
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oxide(s): PoO PoO2
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chloride(s): PoCl2 PoCl4
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Radius: |
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ionic radius (2- ion): pm
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ionic radius (1- ion): pm
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atomic radius: 168 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): pm
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ionic radius (3+ ion): pm
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Conductivity: |
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thermal conductivity: J/m-sec-deg
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electrical conductivity: 1/mohm-cm
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polarizability: 6.8 A^3
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Abundance: |
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source: pitchblende, synthetic
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rel. abund. solar system: log
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abundance earth's crust: -9.7 log
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cost, pure: $/100g
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cost, bulk: $/100g
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