మూస:ఫ్రాన్షియం మూలకము

ఫ్రాన్షియం, 00Fr
ఫ్రాన్షియం
Pronunciation/ˈfrænsiəm/ (FRAN-see-əm)
Mass number[223]
ఫ్రాన్షియం in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Cs

Fr

Uue
రేడాన్ఫ్రాన్షియంరేడియం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 7
Block  s-block
Electron configuration[Rn] 7s1
Electrons per shell2, 8, 18, 32, 18, 8, 1
Physical properties
Phase at STPsolid presumably
Melting point? 300 K ​(? 27 °C, ​? 80 °F)
Boiling point? 950 K ​(? 677 °C, ​? 1250 °F)
Density (near r.t.)? 1.87 (extrapolated) g/cm3
Heat of fusionca. 2 kJ/mol
Heat of vaporizationca. 65 kJ/mol
Vapor pressure (extrapolated)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 404 454 519 608 738 946
Atomic properties
Oxidation states+1 (expected to have a strongly basic oxide)
ElectronegativityPauling scale: 0.7
Covalent radius260 (extrapolated) pm
Van der Waals radius348 (extrapolated) pm
Other properties
Natural occurrencefrom decay
Crystal structurebody-centered cubic (bcc) (extrapolated)
Body-centered cubic crystal structure for ఫ్రాన్షియం
Thermal conductivity15 (extrapolated) W/(m⋅K)
Electrical resistivity3 µ (calculated) Ω⋅m
Magnetic orderingParamagnetic
CAS Number7440-73-5
History
Namingafter France, homeland of the discoverer
DiscoveryMarguerite Perey (1939)
First isolationMarguerite Perey (1939)
Isotopes of ఫ్రాన్షియం
Template:infobox ఫ్రాన్షియం isotopes does not exist
 Category: ఫ్రాన్షియం
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References