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Polonium chemical properties
Polonium with the atomic number 84 is in the group 16 and period 6 of the Periodic Table of Mendeleev.
Some compounds of polonium are: PoO, PoO2, PoO3, PoH2, halides as PoX2, PoX4, PoX6 and the strange class of polonides (compounds of polonium with other metals). The Pauling electronegativity is 2. Possible valences are: 2, 4, 5, 6, -2.
Polonium physical properties
Density: alpha phase: 9,196 g/cm3; beta phase: 9,398 g/cm3
Melting point: 254 0C
Boiling point: 962 0C
Heat of fusion: 13 kJ/mol
Heat of vaporization: 102,91 kJ/mol
Molar heat capacity: 26,4 J/mol.K
Electrical resistivity: 0, 40 microohm.meter
Thermal conductivity: 20 W/m.K
Atomic radius (empirical): 168 pm
First ionization energy: 812,1 kJ/mol
Crystalline structure: alpha-phase: cubic; beta phase: rhombohedral
Magnetism: monmagnetic
Thermal expansion: 23,5 microm/m.K
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoSome characteristics of plutonium are: - isotopes Pu-239 and Pu-241 are fissile
- is a metal in the actinoids family
- is radioactive
- is an artificial element
- is toxic
- is paramagnetic
- melting point: 639,4 0C
- boiling point: 3 228 0C
- heat of fusion: 2,82 kJ/mol
- Pauling electronegativity: 1,28
- possible valences: 2 to 7 (an exceptional situation)
- electron configuration: [Rn]5f67s2
- empirical atomic radius: 159 pm
- crystalline structure: monoclinic
- thermal conductivity: 6,74 W/m.K
- electrical resistivity: 1,46 microohm.m
- Vickers hardness: 255 - Brinell hardness: 242 - Mohs hardness: cca. 3,7
Wiki User
∙ 8y agoPolonium physical properties Density: alpha phase: 9,196 g/cm3; beta phase: 9,398 g/cm3 Melting point: 254 0C Boiling point: 962 0C Heat of fusion: 13 kJ/mol Heat of vaporization: 102,91 kJ/mol Molar heat capacity: 26,4 J/mol.K Electrical resistivity: 0, 40 microohm.m Thermal conductivity: 20 W/m.K Atomic radius (empirical): 168 pm First ionization energy: 812,1 kJ/mol Crystalline structure: alpha-phase: cubic; beta phase: rhombohedral
Wiki User
∙ 14y agowhat are the physical and chemical properties of polonium?
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