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  1. Hydrogen over helium: A philosophical position.René Vernon - 2024 - Foundations of Chemistry 26 (1):15-36.
    Hydrogen is troublesome in any periodic table classification. This being so it may as well be placed in a position that confers desirable attributes to the arrangement of the elements, while notionally recognising its lineage to the group 1 alkali metals and the group 17 halogens. Since the noble gases bridge the halogens and the alkali metals, and hydrogen encompasses the transition from the alkali metals to the halogens, there is more to the idea of hydrogen over helium. (Meyer 1870, (...)
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  • On the ‘true position’ of hydrogen in the Periodic Table.Vladimir M. Petruševski & Julijana Cvetković - 2018 - Foundations of Chemistry 20 (3):251-260.
    Several attempts have recently been made to point to ‘the proper place’ for hydrogen in the Periodic Table of the elements. There are altogether five different types of arguments that lead to the following conclusions: hydrogen should be placed in group 1, above lithium; hydrogen should be placed in group 17, above fluorine; hydrogen is to be placed in group 14, above carbon; hydrogen should be positioned above both lithium and fluorine and hydrogen should be treated as a stand-alone element, (...)
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