Definition of periodic law in English:

periodic law

noun

Chemistry
  • A law stating that the elements, when listed in order of their atomic numbers, fall into recurring groups, so that elements with similar properties occur at regular intervals.

    • ‘This site provides details about him and his major achievement, with the discovery of periodic law and the table.’
    • ‘His discovery of the periodic law in the late 1860s was a remarkable accomplishment.’