General: |
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Name: Francium
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Symbol: Fr
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Group: Alkali Met.
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Atomic weight: (223)
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Density @ 293 K: ?
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Atomic volume: ?
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Group: Alkali Met.
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discovered: 1939
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States: |
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state (s, l, g): s
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melting point: 300.2 K
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boiling point: 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: 384 kJ/mole
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electronegativity: 0.7
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2nd ionization energy: kJ/mole
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electron affinity: kJ/mole
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3rd ionization energy: kJ/mole
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Specific heat: ?
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heat atomization: 73 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,18,32,18,8,1
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electron configuration: [Rn] 7s1
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minimum oxidation number: 0
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maximum oxidation number: 1
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min. common oxidation no.: 0
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max. common oxidation no.: 1
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Appearance & Characteristics: |
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structure:
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color:
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uses:
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toxicity:
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hardness: mohs
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characteristics: Radioactive
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Reactions: |
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reaction with air:
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reaction with 6M HCl: vigorous, =>H2, FrCl
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reaction with 6M HCl: vigorous, =>H2, FrCl
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reaction with 15M HNO3:
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reaction with 6M NaOH: vigorous, =>H2, FrOH
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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):
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chloride(s):
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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: pm
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ionic radius (1+ ion): 194 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: 48.7 A^3
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Abundance: |
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source: Synthetic(U-235 decay)
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rel. abund. solar system: log
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abundance earth's crust: log
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cost, pure: $/100g
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cost, bulk: $/100g
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