The word translated here as stepwise was rendered as stufenweise in the German abstract cited here, but in the Russian article from which the abstract was taken, the properties were said to display периодичность (periodicity). Notes The principle of periodicity-repetition of chemical properties in a series of elements arranged by atomic weight-is apparent in the table, but this first sentence does not make it so clear. ![]() Thus Bo (?) appears as an analogue of Bo and Al, as is well known to have been long established experimentally.
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