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Astatine Heavy metals Metalloid

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Allotropes of boron ♦ Block (periodic table) ♦ Dividing line between metals and nonmetals ♦ Electron affinity (data page) ♦ Fluorine ♦ Lead ♦ Light metal ♦ List of alternative nonmetal classes ♦ List of aqua-ions and their hydroxo- and oxo- derivatives in aqueous solution ♦ List of metalloid lists ♦ Metalloid (nomenclature origin and usage) ♦ Nonmetal ♦ Metal ♦ Nitrogen ♦ Noble metal ♦ Periodic table ♦ Periodic table (crystal structure) ♦ Post-transition metal (with thanks to Double sharp) ♦ Properties of nonmetals (and metalloids) by group ♦ Properties of metals, metalloids and nonmetals ♦ Toxic heavy metal ♦ Types of periodic tables

Last updated May 24th, 2025

2013	Which elements are metalloids? Journal of Chemical Education. 90, 12, 1703–1707, doi:10.1021/ed3008457. Citations: 82; Views: 2,578
2017	Group 3 for IUPAC: I. User:Sandbh/Group 3, lodged Jan 11th
2018	Iyer S, As sesquicentennial occurs, debate on arrangement of periodic table continues, Daily Bruin, November 21st, with quotations and contributions from Eric Scerri, PJ Stewart, and RE Vernon
2019	Reader comment, Miller JS 2019, Viewpoint: Metalloids—An electronic band structure perspective. Chemistry: A European Journal. 25, 48, 11177, doi:10.1002/chem.201903167
2019	Group 3 for IUPAC: II, lodged Oct 11th
2020	Organising the metals and nonmetals, Foundations of Chemistry, 22, 2, 217−233. Accesses: † 29,973; citations: 15
2020	The location and composition of Group 3 of the periodic table, Foundations of Chemistry, 23, 2, 155–197. Accesses: † 28,029; citations: 27
2020	Cao C, Vernon RE, Schwarz WEH, & Li J, Understanding periodic and non-periodic chemistry in periodic tables. Frontiers in Chemistry. Accesses: 38,430; ‡ citations: 54
2021	Group 3 for IUPAC: III, lodged November 3rd
2022	ACS Spring Technical Program, March 23, "Which elements are metals and nonmetals(?)", virtual presentation, doi:10.1021/scimeetings.2c00137
2023	The location and composition of Group 3: A follow-on examination. 1,357 views; 875 downloads; 6 recommendations §
2024	Hydrogen over helium: A philosophical position, Foundations of Chemistry, 26, 1, 15–36. Accesses: 297; citations: 2
ongoing	Internet database of periodic tables, 146 contributions

† SpringerLink + Researchgate
‡ Frontiers Media + Researchgate
§ ChemRxiv + Researchgate

Wikipedia related

•  Essay: A young person’s guide to 1RY, 2RY, and 3RY sources

Chemical elements related

•  Metal—finish the rewrite; submit to WP:FAC
•  Which elements are noble metals(?): Ru, Rh, Pd, Ag; Os, Ir, Pt, Au, with Ag as an outlier given its greater reactivity.
•  Periodic table—review

Eh?

•  Solving the Mysteries of the Solid Elements (From the Origin of Elements to Machine Parts)

•  Heavy metal (elements)
•  Nonmetal
•  Representative and transition element group names
•  The periodic table family tree; the n, n + 10 relationship; and Group 3

•  Nonmetal redraft (old)
  
•  Quotes from the literature (nonmetals)
  
•  Sandbox
  
•  User:Sandbh/Nonmetal_rfc
•  User:Sandbh/Alternate_periodic_tables_redraft

•  User:Double sharp/Group 3 sources
•  Eric Scerri lecture Mar 1, 2022, Univ. of New Hampshire
•  Semimetal electron density
•  Thermodynamics and the group 3 question