Talk:Periodic table

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Semi-protected edit request on 24 December 2024

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ADD LINK kainosymmetry to the word 'kainosymmetric' in Variations. 24.161.66.164 (talk) 18:24, 24 December 2024 (UTC)[reply]

Done Good idea! DMacks (talk) 18:30, 24 December 2024 (UTC)[reply]

Structure section's Group nomenclature

Would it make sense to change the preferred nomenclature of Group in the Structure section from being Tetrels, Pnictogens etc. to being the far-more-commonplace Mendeleev (i.e. I–VIII ) style? Chumpih ^t 16:13, 2 February 2025 (UTC)[reply]

The standard IUPAC group numbers 1 through 18 are already at the top. The ambiguities of the I-VIII style are discussed in the subsection Periodic table#Group names and numbers. Double sharp (talk) 01:44, 3 February 2025 (UTC)[reply]

Lutetium (Lu) should be treated as a lanthanide or a transition metal? What about Lawrencium (Lr), is it an actinide or a transition metal?

According to the Periodic Table from Wikipedia, the table is confusing. It appears to universally recognize Lu and Lr as transition metals, even though Lu could be a lanthanide and Lr could be an actinide, respectively. NaoHoi (talk) 08:22, 5 April 2025 (UTC)[reply]

@NaoHoi This is discussed fully at Group 3 element and endlessly in earlier discussions on the talk page here (see archives). Mike Turnbull (talk) 11:08, 5 April 2025 (UTC)[reply]

@NaoHoi, @Michael D. Turnbull: The discussion in the archives of this page are eclipsed by those at WT:ELEM. "Endlessly" may be an exaggeration, but not by much! YBG (talk) 16:04, 5 April 2025 (UTC)[reply]

Superheavy elements & new periodic layouts

The hunt for elements beyond 118 is intensifying. Experiments now use novel beam-target combinations (e.g. vanadium beams on curium) to try to create element 119. In parallel, theorists predict dramatic changes in table structure at high Z: for example, Pyykkö’s relativistic calculations suggest new blocks may appear near element 139–172, and some have even proposed “50-column” table layouts to accommodate these superheavy electron configurations. One speculative framework is a 4D periodic table: Zeiner-Gundersen et al. (2024) add a “quantum topological stability” axis to capture isotopic stability and relativistic effects, predicting new “islands of stability” for superheavy nucleire. Designios (talk) 01:30, 19 May 2025 (UTC)[reply]