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To-do list for Francium: I (Rmrfstar) believe that the information included in these books should be incorporated into this article ASAP. Unfortunately, they're not easy to find...
Electronegativity: The Pauling scale is the most commonly used system for electronegativity, and most complete electronegativity lists use it. These lists also put francium as the lowest electronegativity with 0.7. However, some of the reported values may be estimated rather than calculated. The Allen scale may be a more complete system, and it places caesium as the least electronegative element. However, it is difficult to find lists of Allen electronegativity values to confirm this. There seems to be no one source which says all of that, so for now, the Pauling value will remain, unless a better source can be found. |
I think if there are GHS and NFPA datas for francium, the hazard data is expected to be like this:
That will dominate the most hazardous element in every aspect! They will be explosive, flammable, corrosive, extremely toxic, carcinogenic, and extremely hazardous to environment.
Hazards | |
---|---|
GHS labelling:[citation needed] | |
Danger | |
H200, H228, H260, H300, H310, H314, H317, H330, H350, H360, H370, H372, H410 | |
P201, P202, P210, P223, P231+P232, P261, P262, P264, P270, P273, P280, P284, P301+P310, P304+P312, P305+P351+P338, P307+P311, P310, P370+P378, P371+P380+P375, P372, P402, P422 | |
NFPA 704 (fire diamond) |
2405:9800:BA31:F6:8071:4ACA:97FD:8D99 (talk) 09:23, 12 January 2022 (UTC)
|P-phrases=
? -DePiep (talk) 09:37, 12 January 2022 (UTC)
I have noticed that the Francium article does not have a lead image of the pure sample like many other element pages. This is obviously because bulk francium has never been prepared.
However, later in the article, it shows an image of light of 200,000 francium atoms and an image of heat from 300,000 francium atoms.
Though this is obviously not the same as a bulk sample, I think we should use one of these images as a lead image, as it is the closest thing we have to a macroscopic sample of francium. We could also provide a caption with it that explains how it is a light or heat image.
2601:600:9080:A4B0:B17F:E0A9:50F5:577E (talk) 17:30, 7 January 2023 (UTC)
Since nobody has objected I will add the image. OmegaMantis (talk) 22:23, 9 September 2023 (UTC)
Never mind, just realized it's a non-free image. Won't use it. OmegaMantis (talk) 23:03, 9 September 2023 (UTC)
I wonder how scientists were able to get enough francium atoms together to be able to identify a specific melting point given its short half-life. MightyArms (talk) 19:59, 26 September 2023 (UTC)
Two quite differentvalues are given for the estimate of the amount of Francium in the earth's crust. One, unreferenced, is 200-500 g, while the second, referenced, is an ounce (28 g, I presume). It would be good to either pull these two estiamted into the same place in the text, or decide which is more reasonable. The use of the word 'ounce' makes that estiamte seem to be from American popular literature, not a scientific assessment. 202.172.113.133 (talk) 00:33, 7 January 2024 (UTC)
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