Abstract
IF each period in the periodic system ends in a rare gas (H,He 1st period, Li—Ne 2nd, etc.), then the number of elements in a period can be found from the ordinal number of the period by the following formula: where n is the number of the period and L is the number of elements in the period.
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TOMKEIEFF, M. Length of the Period of the Periodic System. Nature 167, 954 (1951). https://doi.org/10.1038/167954b0
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DOI: https://doi.org/10.1038/167954b0
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