Talk:Caesium

Semi-protected edit request on 6 March 2020
I have found an error in this page and wish to correct it Quantum squid88 (talk) 19:39, 6 March 2020 (UTC)
 * User:Quantum squid88 Please state here that error and the correction you propose. -DePiep (talk) 19:49, 6 March 2020 (UTC)
 * The mistake I found
 * DePiep in this article it says caesium is one of 5 liquid metals but there are only 2 and it isn't a liquid at room temperature. — Preceding unsigned comment added by Quantum squid88 (talk • contribs) 19:58, 6 March 2020 (UTC)
 * ❌. No, it says that cesium is one of five metals that are liquid at or near room temperature; the explanatory note gives the other four along with their melting points. –Deacon Vorbis (carbon &bull; videos) 20:52, 6 March 2020 (UTC)
 * The note says it. The problem stems from "near room temperature": that is not exact enough to be called "fluid in real life". Only two elements are: Hg and Br. -DePiep (talk) 20:58, 6 March 2020 (UTC)
 * Well, probably so is francium at room temperature, from its estimated melting point. Copernicium too, according to predictions, and maybe also flerovium (if it isn't a gaseous metal, that is). But that's why we write "stable" and have a note about Fr, Cn, and Fl. ^_^ Double sharp (talk) 14:00, 1 April 2020 (UTC)
 * Correction: francium should probably be solid at r.t., because of stronger 7s binding. Still, if rubidium is close enough to be thought of as "nearly liquid", then so should francium. Double sharp (talk) 04:14, 1 April 2021 (UTC)

Semi-protected edit request on 28 October 2020

 * I understand text below is proposed to be added. Please take a look. -DePiep (talk) 11:58, 28 October 2020 (UTC)

Biology
Cesium is absorbed by animal and plant cells in a competitive way with potassium, but cesium has no known function; however, at high concentrations, it can cause toxicity in plants, inhibiting their growth. Indeed, mammalian organisms, during evolution, began to distinguish the useless (non-radioactive) cesium from potassium, which is essential in the Na + / K + pump of animal cell membranes. This is clearly visible in the poor absorption and selectivity for cesium of the liver and fetuses, in the autoradiographs of Nelson et al. (1961) . The human organism in fact expels cesium through three emunctories: the kidney, and also through the salivary glands and, greatly, through the exocrine pancreas, that concentrate, filter it and eliminate it with secrete saliva and pancreatic juice in the intestine, as reported by Venturi In fact, "Prussian Blue" (ferric ferrocyanide), ingested orally, is able in the intestine to chelate cesium, preventing its reabsorption, and to eliminate it in the faeces, and, in this way, purify the human organism by about half of cesium in 30-70 days.


 * sign User:A-Venturi Sebastiano (assumed) 28-10-2020

Graph source
What's the source of File:AirDoseChernobylVector.svg? ("A graph showing the relative contributions made by different substances to the levels of radiation in Prypiat after the Chernobyl nuclear disaster.") There must be one but I couldn't find it after a (rather quick) search. A455bcd9 (talk) 10:39, 11 December 2022 (UTC)

It is yellow because it absorbs blue wavelengths
Here are statements that I deleted today. 1) "The golden colour of caesium comes from the decreasing frequency of light required to excite electrons of the alkali metals as the group is descended."

IMHO, this sentence says nothing, and isn't even decent English.

2) "For lithium through rubidium this frequency [which frequency?] is in the ultraviolet, but for caesium it enters the blue–violet end of the spectrum; in other words, the plasmonic frequency of the alkali metals becomes lower from lithium to caesium. Thus caesium transmits and partially absorbs violet light preferentially while other colours (having lower frequency) are reflected; hence it appears yellowish."

So we learn that if a material absorbs at the "blue–violet end of the spectrum," it is yellow. --Smokefoot (talk) 23:07, 18 March 2023 (UTC)

"Сaesium" listed at Redirects for discussion
The redirect [//en.wikipedia.org/w/index.php?title=%D0%A1aesium&redirect=no Сaesium] has been listed at redirects for discussion to determine whether its use and function meets the redirect guidelines. Readers of this page are welcome to comment on this redirect at  until a consensus is reached. -- Tamzin  &#91;cetacean needed&#93; (she&#124;they&#124;xe) 00:21, 18 October 2023 (UTC)