Dictionary

periodic law

noun

Definition of PERIODIC LAW

:  a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties

First Known Use of PERIODIC LAW

1872

periodic law

noun    (Medical Dictionary)

Medical Definition of PERIODIC LAW

:  a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties—called also Mendeleev's law

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