2026-10-06 habr.com: Sivchenko (2022), "Из чего состоит мировой эфир. Последняя теория Менделеева"

URL: https://habr.com/ru/articles/653695/ (Oleg Sivchenko, 27 Feb 2022; popular science; about 71K views). Found with the Google query habr "Из чего состоит мировой эфир" Менделеев.

Found [web]

• A photograph of the periodic table "in the appendix to this article, 1905 copy" (from the brochure). The author says it has a zero period and a first period with hydrogen, with a cell to the left of hydrogen for a noble gas. He guesses that x may be coronium and y newtonium, which is the reverse of Mendeleev's own labels (x = newtonium, y = coronium per the Russian text). This is an error in the article; it should not be taken as a source for the labels.
• Related work (priority 3) listed in the article:
• "nebulium": nebular emission lines reported in 1898 (attributed here to Margaret Huggins), with an assumed atomic weight of about 2.74.
• "protofluorine" (a super-light halogen above fluorine). This matches Mendeleev's own footnote 17 on a halogen lighter than helium.
• "neutronium", predicted in 1926 by Andreas von Antropoff as an element of about 0.1 of hydrogen's weight that hardly combines and penetrates everything.
• The author's own view: Mendeleev's speculations anticipated inert particles; he compares newtonium to the neutron and neutronium to the neutrino. This is his interpretation.
• It repeats that coronium was "in fact" highly ionised iron, and that Nasini claimed coronium from Vesuvius fumaroles in 1898.

Bears on

Claim 2 (the 1905 table as printed), and related later "element zero" ideas (priority 3).