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francium

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francium
francium Chem. (ˈfrænsɪəm) [mod.L. (M. Perey 1946, in Jrnl. de Chim. phys. XLIII. 157), f. Franc(e: see -ium.] A radioactive metallic element that is the heaviest member of the alkali-metal series and is chemically similar to cæsium; all its isotopes have short half-lives and only one (francium 223)... Oxford English Dictionary
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Francium compounds
Francium compounds are compounds containing the element francium (Fr). For example, francium chloride would be produced by the reaction of francium and chlorine. wikipedia.org
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Francium chloride
reaction of francium and chlorine gas. References Francium compounds chlorides wikipedia.org
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virginium
virginium Obs. exc. Hist. (vəˈdʒɪnɪəm) [f. Virginia, name of a state of the U.S. + -ium.] = francium.1932 F. Allison et al. in Jrnl. Amer. Chem. Soc. LIV. 615 We suggest the name virginium and the symbol Va for element 87. 1936 [see alabamine]. 1938 Encycl. Brit. Bk. of Year 145/1 The discovery of e... Oxford English Dictionary
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Francium hydroxide
Francium hydroxide is a hypothetical inorganic compound with a chemical formula FrOH. It is a hydroxide of francium. References Francium compounds Hydroxides Hypothetical chemical compounds wikipedia.org
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Isotopes of francium
Francium (87Fr) has no stable isotopes. A standard atomic weight cannot be given. Francium wikipedia.org
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Caesium perchlorate
This low solubility played an important role in the characterization of francium as an alkali metal, as francium perchlorate coprecipitates with caesium wikipedia.org
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Ununennium
The analogous francium(V) compound, [FrF6]−, might also be achievable, but is not experimentally known. , which shows some 6p3/2 contribution to the bonding in francium superoxide (FrO2). wikipedia.org
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Francio
Francio may be: The eponymous founder of the Franks according to the Liber Historiae Francorum The Italian name of Francium The Esperanto name of France wikipedia.org
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ذرة شديدة البرودة
والطرق الرئيسية لإنتاج الذرات شديدة البرودة هي 1- تبريد البخار 2- تبريد الليزر أمثلة - نقطة ذوبان الهيليوم 0,95كلفن - أكبر كتلة من عنصر الفرانسيوم francium wikipedia.org
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我的世界红石大神为何不把精力放在现实世界呢？
弱鸡不请自来，熟人太多匿了 不，你想错了，在TIS里面不少985211院校的学生，也不缺各种专业的硕士甚至博士，例如Fallen_Breath就是某五道口职业技术学院，francium1996是化学硕士还是博士，现在在美国留学，脆脆鲨是CS专业的，学位不明，但是在加拿大留学，XK是建筑学博士，诸如此类 zhihu
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Marguerite Perey
In 1939, Perey discovered the element francium by purifying samples of lanthanum that contained actinium. "Francium: élément 87," Bulletin de la Société chimique de France, 18: 779 (1951). wikipedia.org
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把元素周期表里面的元素各买一克，大概需要多少钱？
关键是这么贵，其实是有价无市的——买不到，科学事业它不卖给你…… 除了一些天价元素，还有元素的特别之处在于非常难保持—— 比如钫元素(francium)，几乎一瞬间就会变成反应成其它元素，最久命的单体寿命也只有22分钟，整个地球上都只存在几克或者几微克， 只能通过实验室合成得到、地球上自然界根本没法找到的第 zhihu
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Gene D. Sprouse
In particular he has with Luis Orozco studied the element Francium using laser trapping techniques. wikipedia.org
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Sylvain Liberman
He is known as the leader of the scientific team that made the first measurements of the optical spectrum of francium. At CERN, he led the team credited with the first recording of a line of the optical spectrum of francium. wikipedia.org
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