Francium element properties

Back to Periodic Table


Name: Francium Symbol: Fr
Group: Alkali Met. Atomic weight: (223)
Density @ 293 K: ? Atomic volume: ?
Group: Alkali Met. discovered: 1939


state (s, l, g): s
melting point: 300.2 K boiling point: K
Heat of fusion: ? Heat of vaporization: ?


1st ionization energy: 384 kJ/mole
electronegativity: 0.7 2nd ionization energy: kJ/mole
electron affinity: kJ/mole 3rd ionization energy: kJ/mole
Specific heat: ? heat atomization: 73 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,8,18,32,18,8,1 electron configuration: [Rn] 7s1
minimum oxidation number: 0 maximum oxidation number: 1
min. common oxidation no.: 0 max. common oxidation no.: 1

Appearance & Characteristics:

structure: color:
uses: toxicity:
hardness: mohs characteristics: Radioactive


reaction with air:
reaction with 6M HCl: vigorous, =>H2, FrCl reaction with 6M HCl: vigorous, =>H2, FrCl
reaction with 15M HNO3: reaction with 6M NaOH: vigorous, =>H2, FrOH

Other Forms:

number of isotopes: 1 hydride(s):
oxide(s): chloride(s):


ionic radius (2- ion): pm ionic radius (1- ion): pm
atomic radius: pm ionic radius (1+ ion): 194 pm
ionic radius (2+ ion): pm ionic radius (3+ ion): pm


thermal conductivity: J/m-sec-deg
electrical conductivity: 1/mohm-cm polarizability: 48.7 A^3


source: Synthetic(U-235 decay)
rel. abund. solar system: log abundance earth's crust: log
cost, pure: $/100g cost, bulk: $/100g

Science Promotion Website] [ Membership] [ Donate] [ Tell Friends] [ Our Button] [ Links] [ Contact Us] [ Advertise with SL

Science eBooks] [ e-Tools for Scientists] [ Scientific Photos] [ Journal Club Pal] [ SL Shop] [ Multimedia
Microscope Masters Contest] [ GRE Subject Biochemistry, Cell and Molecular Biology eBooks and Practice Tests] [ PCR (Polymerase Chain Reaction) Troubleshooting, Optimization, Tips and Tricks - A Lab Guide for Beginners and Experts] [