Talk:Actinide

Actinide has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it.

Article milestones
Date	Process	Result
July 26, 2011	Good article nominee	Listed
September 29, 2014	Good topic candidate	Promoted
February 15, 2024	Good topic removal candidate	Demoted
A fact from this article appeared on Wikipedia's Main Page in the "Did you know?" column on October 29, 2010. The text of the entry was: Did you know ... that some actinides* glow because of their radioactivity* (example pictured)?
Current status: Good article

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Colors of ions[edit]

See the second table in Actinide#Properties. Since the colors are the topic (not an illustration), I have made the bg white for good showing. Now it appears that three ions have no color added at all (per row the leftmmost one, starting with Ac³⁺). I suggest someone adds their color as bg color (which could be white). As it stands now, their colors are "undecided and unexplained". -DePiep (talk) 08:13, 10 November 2019 (UTC)[reply]

Maybe this second table could be merged into the big one above it. (Colors row can have multiple subrows). -DePiep (talk) 08:28, 10 November 2019 (UTC)[reply]

And, the big table be transposed, so that columns can be sortable for more comparing options. -DePiep (talk) 08:29, 10 November 2019 (UTC)[reply]

They are colourless. Think of plain water. Double sharp (talk) 08:35, 24 March 2021 (UTC)[reply]

Error in graph?[edit]

Just noticed: Isn't there an error in the table or graph for Lr? The table says the longest-lived isotope for Lr(Z=103) is Lr 266. Yet in the isotope graph, there are no isotopes for Lr over 262. — Preceding unsigned comment added by 88.103.29.180 (talk) 22:27, 10 June 2020 (UTC)[reply]

Seems the graph predates discovery of ²⁶⁶Lr; should probably be changed. Double sharp (talk) 12:31, 24 January 2021 (UTC)[reply]

Actinide vs Actinoid[edit]

IUPAC argues that the -ide ending is reserved for a binary compound, such as chlorides or nitrides. The -oid ending means "similar to" as in humanoid or android. Therefore, I do propose to use the new official name first, with the old -ide ending second as a synonym. --Gunnar (talk) 10:18, 1 September 2020 (UTC)[reply]

I agree, but judging from Talk:Lanthanide, this seems unlikely to get consensus.

Also: the idea that actinoids are similar to Ac (which is basically a more basic and electropositive La) is kind of a joke. Anyone who believes it should compare chemistries of lanthanum and uranium. Lanthanoids are indeed similar to La. So maybe the -oid ending is not particularly right either. I don't know if this influenced anybody to avoid adopting the new -oid endings, though. Double sharp (talk) 08:34, 24 March 2021 (UTC)[reply]