Pransyo

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Francium
87Fr
Cs ↑ Fr ↓ Uue Periodic table radon ← francium → radium
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	1, 7, s
Gibug-aton sa atomo	(223)
Kontorno sa elektron	[Rn] 7s1 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
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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.