The order in which these orbitals are filled is given by the n + ℓ rule (also known as the Madelung rule (after Erwin Madelung), or the Klechkowski rule (after Vsevolod Klechkovsky in some, mostly French and Russian-speaking, countries), or the diagonal rule.
Klechkovsky also studied theoretical chemistry, and proposed a theoretical justification of the empirical Madelung rule for the ordering of atomic orbital energies.
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Following the 1957 Kyshtym disaster, Klechkovsky led the research projects studying the long-term effects of radioactive contamination at the site.
Vsevolod Pudovkin | Vsevolod Bobrov | Vsevolod Ivanov | Vsevolod II of Kiev | Vsevolod Vishnevsky | Vsevolod Mstislavich | Vsevolod Klechkovsky | Vsevolod IV of Kiev | Vsevolod Bazhenov | Vsevolod Mstislavich of Volhynia | Vsevolod Balitsky | Vsevolod Abramovich |