Talk:Melting points of the elements (data page)

This page is intended as an authoritative data collection with citation of sources, that may be cited as a central reference by other articles (such as for the chemical elements). Femto 20:10, 18 Mar 2005 (UTC)

Guessed values

Elements like francium, astatine, fermium, mendelevium (and heavier) have never been obtained in a solid state and their melting points have never been measured. Can one believe the melting point of Fr is exactly 300 K and Md and No exactly 1100 K? It is better to cancel such "data", because a reader may think they are real, especially when he or she finds "agreement of sources". Sincerely, Witold, a casual visitor.87.207.174.157 23:45, 19 September 2006 (UTC)[reply]

Trailing zeros usually aren't treated as significant digits, and all measurable properties have an uncertainty associated with them, some more some less. Unfortunately the uncertainty is commonly omitted even by good sources. I don't think it's a problem when we give values according to reliable sources that weren't directly measured but derived with reasonable certainty. Including proper uncertainties would still be better though, if sources can be found. Femto 14:38, 20 September 2006 (UTC)[reply]

OTOH, those values should probably then not be converted into Celsius with false precision, as is currently done. Double sharp (talk) 22:59, 9 October 2022 (UTC)[reply]

Which is the unit used in a source (K, C, F)? And so then, which is used in the bolded "use" values? Both for the estimated values (I'd guess: the "x00" ones), and the RL ones. AlsO, the substance should be provided, as the abstract element does noT have a mp; think diatomic molecules and allotropes (simple substances altogether).

(Research going on on the three values. All three "use" values from this page are hardcoded into the element infobox. On the infobox page, the triangular check is performed using {{convert}}. It appears delta's are present in this check (for Al: see bp not mp). This is to be resolved, preferably by pointing the true source unit used. Alas, this is waiting in place for some years tbh). DePiep (talk) 05:47, 10 October 2022 (UTC)[reply]

request

iwant to know , can i aded cacl2 in melted metall —Preceding unsigned comment added by 217.219.40.86 (talk) 12:38, 13 May 2008 (UTC)[reply]

Better Table Formatting

Why not something like this? Perhaps with references for each value in the table.

Element	Atomic Number	Freezing Point	Boiling Point
Hydrogen	1	14.01 K	20.28 K

137.100.97.11 (talk) 13:09, 25 April 2013 (UTC)[reply]

This already exists at: List_of_elements_by_melting_point -- recommending merge 68.54.162.15 (talk) 19:21, 7 May 2013 (UTC)[reply]

Agreed. The current table, if you attempt to sort by temperature, becomes a useless mess. 2A02:A31D:A03D:6400:5CB2:4C7F:8753:F709 (talk) 23:10, 14 July 2020 (UTC)[reply]

re List_of_elements_by_melting_point: that list is just for the overview, and does not have any sources (it should refer to these pages ;-) ).

A merge would be OK, and recreating then into a sortable list. However, multiple sources give different values (for each element), IMO those variants per element should be kept. Also, temperatures in K, C, F I'd say. -DePiep (talk) 09:03, 16 July 2020 (UTC)[reply]

When converting K, C, F values by {{Convert}}, sometimes gives different values (eg, converted C =/= listed C). What to do?

Also, I'd like to learn why out of multiple options one value is to be "Use"d.

-DePiep (talk) 09:08, 16 July 2020 (UTC)[reply]