红薯开花预示着什么

87 ???? ← ???????????? → ???????? Cs ↑ Fr ↓ Uue ??????? ?????
?????? ?????????
???, ??????, ????????? ??????	????????????, Fr, 87
????????? ??????	alkali metals
?????, ???????, ????	1, 7, s
Appearance	metallic
????????? ??	(223) g/mol
????????? ???????	[Rn] 7s1
????? ?????????? ???????? ??????	2, 8, 18, 32, 18, 8, 1
??? ?????????
???	????
????? (?????? ??? ? ????)	? 1.87 g/cm3
???????	300 K (27 °C, 80 °F)
??????????	? 950 K (? 677 °C, ? 1250 °F)
????? ??? ???	ca. 2 kJ/mol
??????????? ??? ???	ca. 65 kJ/mol
????? ??? (extrapolated) P/???????? ? ?? ??? ? ?? ?? ?? ??? ?? T/?????? ??????????? 404 454 519 608 738 946
????????? ?????????
???????? ???	cubic body centered
???? ??????	1 (strongly basic oxide)
????? ?????????	0.7 (?????? ?????)
Ionization energies	1st: 380 kJ/mol
???????? ?????????
Magnetic ordering	?
Electrical resistivity	? 3 μΩ·m
??? ?????????	(300 K)  ? 15 W/(m·K)
?? ? ?? ??????? ??????	7440-73-5
??????? ??????????? ?????????
?????? ??????: francium?? ????????? iso NA half-life DM DE (MeV) DP 222Fr syn 14.2 min β- 2.033 222Ra 223Fr 100% 22.00 min β- 1.149 221Ra α 5.430 219At
References

????????????

?????????????? ????????? ???????

百度 身体健康是完美性爱的基础，学会了这5招，才能不给你的性爱添麻烦！

???????????? (??????: Francium) ??????? ?????? ???? ????? ??????? ?????????????? ????? ????? Fr? ??? ???????? ?????-??????? ????

????????

???????????? ?? ????????????? ?????? ??????????? ????? ??????? ??????: ?? ???????????? ???????, francium-223, ?? ????-???? ????? 22 ?????? ??????? ??????? ?????? ?? ????????????, ??? ??????? ????????? ????????? ???????, ????????????-219 (????????????-223-?? ???? ?????), ?? ????-???? 56 ???????, ???? ????????? ????????????-210 ????-?????? ???? ???? ???? ???? ??? ????? 8.1 ??????? ?????????????? ????? ??????? ????? ???? ????????????, ???????? ?? ????? ????? ???? ???????????-???-??? ??????? ??????? ????? ???????-????? ????????? ??????? ????????? ????-???? ?????? ??? ????? ?????? ???, ????????????

???????????? ?? ???? ???????? ???? ??? ????????? ????????? ????????? ?????????? ??????? ???? ??? ????????? ???????? ?? ???? ???? ???, ??? ???????????-??? ???? ???-?? ???????? 0.05092 N/m ??????? ??? ???? ????? Francium ?? ??????? ?????? 8.0 °C (46.4 °F); ????? ??? ???????? ??? ?????????????? ????? ??????? ????????; ???????? ??????????? ??????? ??? ?????? ??? ???? ????? ?????????????? 20 ± 1.5 °C (68.0 ± 2.7 °F) ???????? ??????? ?????? ?????? ?????? ?????????? ??? ?????? ??? ???? ???? 24.861 ± 0.517 °C (76.750 ± 0.931 °F) ????? 620 °C (1,148 °F) ?? ???????? ??????????? ????????; ?????? 598 °C (1,108 °F) ??? 677 °C (1,251 °F), ???????? ??????????? 640 °C (1,184 °??) ?????? ???? ????????????????? ??????? ?????? ???????[1][11] ????????????? ????? ?????? 2.48 g/cm3 (??????????? ?????? 2.4 g/cm3 ????????????? ???) ??? ??? ??? ??????

????? ???? ???? ?????? 0.7 ? ?????????????? ????????? ????????? ?????? ????????, ?????????? ????; 14] ?????????? ??????? ?????????????? ???????? ????? ?????? ????, [??] 392.811(4) kJ/mol ?? ??????? 375.7041(2) kJ/mol ?????????? ????, ?? ???????? ?????? ???? ?????????? ???, ??? ??? ?????? ?? ???????? ?? ????? ????? ???????? ?????????????? ?????????? ??????? ?????? ????????? ??????? ???? ???? ??? Fr? ???? Cs? ?????? ????? ???? ???????????? ????? ?????

?????????

?? ????? ??? ???? ???? ?????????? ??? ?????? ??? ???? ???? ?? ?????, ????? ???????? ?????? ??? ??????? ??????????? ??? ?????????? ?????, ?????????? ????? ???????? ???????? ?????????????? ????? ?????????? ???-???????? ?????? ?????????????? ?????? ????????? Perey ??? Hulubei ?? ????? ???????? ???? ??? ????????? ??? ????? ?????, ??? ?????? ???? ?????? 87 ??????? ????????? ?????? ??????? ??? ???. ??? 87 ?? ???????? ????? ?????????? ?????????????? ?????????????? ??? ????? ????-?????? ????? ????? ??? ????????

????? ???????? ???????? Eka-caesium 7 ?????????, 1939 ?????? ????????? ???? ???????????? ?????????? ????? ?????? ???????? ???????,[32] ??? ???? ??????????????-227 ?? ???? ????? ??????? ???????? ??? 220 keV ?? ????? ????? ?????? ??? ???? ????? ????? 80 keV-?? ???? ?????? ???? ?? ???????????? ??? ?????? ??????? ????? ????????? ?? ?? ????? ??????????? ?????? ?????? ????? ?????? ????? ??? ????, ?? ????????? ???? ????? ??? ???????, ?????? ??????? ??????????????-227 ???? ???? ???????? ???????? ??????? ??????? ????? ?????? ????????, ????????, ????, ?????? ?? ?????????? ?????? ?????????? ??? ???????? ???? ?????? ???? ???????? ????? ????????? ????????? ???????? ??? (???? ???????? ?????? ???? ??????? ???), ??? ??? ????? ??????? ???? ???? ?? ??? ??????????????-227-?? ???? ????? ?????? ???????? ?????? 87? ???? ????? ??????????????-227-? ???? ????? ???? ???? ??????? ?????? ???????? ???? ?????? ????????? ??? ????? ????????? ???? ????????? 0.6% ???, ???? ????? ?? ???? ??? 1% ? ??????? ?????

????? ???? ????????? ??? ???????? ??????????????-?? (??? ??? ????????????-??? ???? ??????)[32] ??? 1946 ????, ???? ??? ???? ???????? ????????? ???? ?????????? (????) ????? ???????? ????????, ???? ???? ??????? ????? ??? ??????? ??????????????? ????????? ???????????? Irène Joliot-Curie, ????? ???? ?????????????, ?????????? ???????? ???????? ?????? ????? ?????? ???????? ????????; ??????, ???????? ??? ???? ???? ???? ?? ??? ???? ?????????? ?????? ??? ???????? ????? ??? ????????? ??? ????????????? ??????? ???? ?? ????? ?????????????? 1949 ???? ?????????????? ??????? ?? ???? ??????? ???????????? ?????????? (IUPAC) ?????? ????? ???????,[8] ?? ????????? ???? ?????? ??? ???????????? ??? ???????? ?????? ???? ???? ????? ?? ????? ?????? ???????, ?????? ??? ?????? ??? ??????? Fr-? ??????? ???????? ??????????? ??? ????????? ??? ???????? ?????? ??? ????????? ?? ???? ????????? ???????? ??? ??????? ?????????????? ??? ???????? ??? ?????? ??????????? ?????, 1970 ??? 1980-?? ???? CERN-? ??????? ?????????? ??? ??? ?? ?????? ???????? ????????

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• ?????????? ???????? (Encyclopedia Britannica)

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