Chemicool

Po

84

(209)
Polonium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General
Name Polonium Symbol Po
atomic number 84 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) s
melting point 527.2 K boiling point 1235 K
Heat of fusion ? Heat of vaporization ?
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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
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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 6M HCl mild, = PoCl2
reaction with 6M HCl mild, = PoCl2 reaction with 15M HNO3
reaction with 6M NaOH
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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
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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
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