Pransyo

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Francium
87Fr
Cs

Fr

Uue
Hydrogen (other non-metal)
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Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinoid)
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Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
radonfranciumradium
Panagway
Unknown, but probably metallic
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan francium, Fr, 87
Paglitok /ˈfrænsiəm/
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-see-əm]]
Kategoriyang elemento puthaw
Group, period, block 17, s
Gibug-aton sa atomo (223)
Kontorno sa elektron [Rn] 7s1
2, 8, 18, 32, 18, 8, 1
Electron shells of francium (2, 8, 18, 32, 18, 8, 1)
Electron shells of francium (2, 8, 18, 32, 18, 8, 1)
History
Pagkadiskobre Marguerite Perey (1939)
First isolation Marguerite Perey (1939)
Physical properties
Phase magahi presumably
Density (near r.t.) ? 1.87 (extrapolated) g·cm−3
Melting point ? 300 K, ? 27 °C, ? 80 °F
Boiling point ? 950 K, ? 677 °C, ? 1250 °F
Heat of fusion ca. 2 kJ·mol−1
Heat of vaporization ca. 65 kJ·mol−1
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 (strongly basic oxide)
Electronegativity 0.7 (Pauling scale)
Ionization energies 1st: 380 kJ·mol−1
Covalent radius 260 (extrapolated) pm
Van der Waals radius 348 (extrapolated) pm
Miscellanea
Crystal structure cubic body-centered (extrapolated)
Magnetic ordering Paramagnetic
Electrical resistivity 3 µ (calculated)Ω·m
Thermal conductivity 15 (extrapolated) W·m−1·K−1
CAS registry number 7440-73-5
Most stable isotopes
Main article: Isotopes of francium
iso NA half-life DM DE (MeV) DP
221Fr trace 4.8 min α 6.457 217At
222Fr syn 14.2 min β 2.033 222Ra
223Fr trace 22.00 min β 1.149 223Ra
α 5.430 219At
· r

Ang pransyo (Iningles francium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Fr ug kaiphan nga atomik 87. Ang pransyo mao ang puthaw.

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