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Post AiRfbP4DpjuumqLLns by [email protected] |
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Post #AiRfbP4DpjuumqLLns by [email protected] |
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About half the periodic tables you see are wrong. The only question is: which… |
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Post #AiRg9ODdUeOE0Bx7VA by [email protected] |
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On Wikipedia, the top row of elements in green start with element 57, lanthanum… |
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Post #AiRgnGVrYzmxgZUa6y by [email protected] |
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@johncarlosbaez trying to figure out what this graphical notation means, before… |
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Post #AiRhKRTVpN8rExDFWy by [email protected] |
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@johncarlosbaez (I am not a chemist.) There's at least one more possibility… |
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Post #AiRiA3IqwY01KYpvBg by [email protected] |
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I have strong opinions about this, explained in this blog article:https://johnc… |
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Post #AiRilF567DBIZg8Uts by [email protected] |
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@Pashhur - that's right, but a more chemical way to say it is: Brittanica s… |
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Post #AiRjm2H5JcvF6CgXZI by [email protected] |
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The only reason we draw the lanthanoids (and actinoids) in a separate row below… |
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Post #AiRjny0EAYjwQfilxA by [email protected] |
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@johncarlosbaez Astrophysicists have the right idea: everything heavier than He… |
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Post #AiRoOsLaYhSzQ7ZFcu by [email protected] |
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@johncarlosbaez Doesn't this kind of ambiguity go all the way up? I recall … |
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Post #AiRoVfIzRkXSzyacWe by [email protected] |
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@johncarlosbaez Checked my books (bought between 89 and 97). Most of them have… |
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Post #AiRoVfNFBvwRDAa19k by [email protected] |
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@maz - truth and justice may be starting to win in this one case! |
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Post #AiRpT89ZpilBYTXfEm by [email protected] |
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@mattmcirvin - hydrogen is certainly another ambiguous case! Is it an element … |
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Post #AiRqQ2U4YV6p3bDbCy by [email protected] |
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@johncarlosbaez I dimly remember that at everyday pressures and very low temper… |
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Post #AiRtl3choZLaXAyE6q by [email protected] |
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@johncarlosbaez I see this as an example of Nature mocking our attempts at clas… |
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Post #AiS5QjabmzRy3h4652 by [email protected] |
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@BartoszMilewski - I'm intrinsically more optimistic about the power of mat… |
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Post #AiS7TTKgt5nsPs3LEW by [email protected] |
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@johncarlosbaez Some of the patterns that most directly encourage putting lanth… |
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Post #AiSD7EHclBCL5yOaaO by [email protected] |
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@mattmcirvin wrote: I *was* wondering if it made sense to put beryllium and mag… |
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Post #AiSDKT0JL8AmW1br5E by [email protected] |
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@mattmcirvin - here you can see more "diagonal relationships". But i… |
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Post #AiSEHxDGfPslIC2HIm by [email protected] |
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@johncarlosbaez Why are you comparing Britannica and Wikipedia?Royal Society of… |
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Post #AiSEHxGoSEiZTBh6pM by [email protected] |
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@pewnack - I'm not so interested in the authority of the sources, just that… |
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Post #AiSEQd8afzoLdTz8hk by [email protected] |
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@pewnack - while the American Chemical Society includes both lanthanum and lute… |
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Post #AiSF9FX1I0rRSEghnc by [email protected] |
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@johncarlosbaez (ice is also a molecular solid, but without that kind of rotati… |
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Post #AiSF9FbH2CGPfQg6Qi by [email protected] |
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@mattmcirvin - the entropy of ice is apparently largely due to the randomness o… |
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Post #AiSHB910ghRdjRkMeO by [email protected] |
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@johncarlosbaez Janet's left-step periodic table is arguably the most elega… |
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Post #AiSHB95cPZ8Bxju2pk by [email protected] |
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@johncarlosbaez I guess the irregularity introduced when we go from Janet's… |
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Post #AiSHB99ACNy08jYsMK by [email protected] |
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@mattmcirvin - It looks like Janet's table is implementing the 'Madelun… |
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Post #AiSIkWpQF7qjg0lMsC by [email protected] |
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@johncarlosbaez I guess my observation was really far more basic than that: in … |
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Post #AiSJ9YYkwYgoHktyMq by [email protected] |
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@mattmcirvin - oh, I was looking at the wrong table just now! Here's Janet… |
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Post #AiSJvHierHnPxLIA76 by [email protected] |
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@johncarlosbaez That table is super regular, but it's more regular than rea… |
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Post #AiSLxoE5AZhTGIK17A by [email protected] |
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@johncarlosbaez ...Anyway, drawing it that full-width way makes me think that t… |
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Post #AiSRWnBTXFaHw6bS5Y by [email protected] |
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@mattmcirvin - I consider scandium and yttrium transition metals simply because… |
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Post #AiSUmtEv5XRjDGa83c by [email protected] |
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@johncarlosbaez I think you meant Polonium. |
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Post #AiTZtjGLH723E3HslU by [email protected] |
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@johncarlosbaez La is included with the Lanthananides (hence the name) because … |
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Post #AiTZtjKb1IR1RFHHOa by [email protected] |
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@johncarlosbaez If I recall my rare earth chemistry, the f-subshell is closer t… |
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Post #AiTZtjO8o7GpcEw6vA by [email protected] |
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@pewnack - cool stuff! Wikipedia says"With the exception of lutetium, the… |
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Post #AiTaRxJZXITGeZ7QPI by [email protected] |
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@johncarlosbaez I suppose it comes down to which elements are better heavier an… |
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Post #AiTaRxNpHTsErl6p2O by [email protected] |
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@60sRefugee - yes, that's the question! The chemical properties don't… |
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Post #AiTbxzBgD0F3gMGRVo by [email protected] |
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@johncarlosbaez Why not? |
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Post #AiTbxzFvxBe1tYFq8u by [email protected] |
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@pewnack - because lutetium, unlike the lanthanides, has a completely full f su… |
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Post #Aj52ITF3xkdWLLnBwW by [email protected] |
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@johncarlosbaez I've got this |
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Post #Aj52ITLRa1jyf8mHtA by [email protected] |
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@byczech - they're pretty! But for the left one, I'd prefer a version … |
