แม่แบบ:กล่องข้อมูล แฟรนเซียม
แฟรนเซียม | |||||||||||||||
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Pronunciation | /ˈfrænsiəm/ | ||||||||||||||
Mass number | [223] | ||||||||||||||
แฟรนเซียม in the periodic table | |||||||||||||||
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Group | group 1: hydrogen and alkali metals | ||||||||||||||
Period | period 7 | ||||||||||||||
Block | s-block | ||||||||||||||
Electron configuration | [Rn] 7s1 | ||||||||||||||
Electrons per shell | 2, 8, 18, 32, 18, 8, 1 | ||||||||||||||
Physical properties | |||||||||||||||
Phase at STP | ของแข็ง 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 fusion | ca. 2 kJ/mol | ||||||||||||||
Heat of vaporization | ca. 65 kJ/mol | ||||||||||||||
Vapor pressure (extrapolated)
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Atomic properties | |||||||||||||||
Oxidation states | +1 (a strongly basic oxide) | ||||||||||||||
Electronegativity | Pauling scale: >0.79 | ||||||||||||||
Covalent radius | 260 (extrapolated) pm | ||||||||||||||
Van der Waals radius | 348 (extrapolated) pm | ||||||||||||||
Other properties | |||||||||||||||
Natural occurrence | from decay | ||||||||||||||
Crystal structure | รูปลูกบาศก์กลางตัว (extrapolated) | ||||||||||||||
Thermal conductivity | 15 (extrapolated) W/(m⋅K) | ||||||||||||||
Electrical resistivity | 3 µ (calculated) Ω⋅m | ||||||||||||||
Magnetic ordering | พาราแมกเนติก | ||||||||||||||
CAS Number | 7440-73-5 | ||||||||||||||
History | |||||||||||||||
Naming | ตาม ประเทศฝรั่งเศส บ้านเกิดของผู้ค้นพบ | ||||||||||||||
Discovery | มาร์เกอไรต์ เปเรย์ (1939) | ||||||||||||||
First isolation | มาร์เกอไรต์ เปเรย์ (1939) | ||||||||||||||
Isotopes of แฟรนเซียม | |||||||||||||||
Template:infobox แฟรนเซียม isotopes does not exist | |||||||||||||||
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