Pransyo

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 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

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.

Galeriya sa hulagway

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