periodic law periodicity factor • periodic motion · · · Info · Definitions · Synonyms · Characters · · periodic law · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) (chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbers. Synonyms: periodic law, Mendeleev's law. · · Noun Definition 1 Synonyms · · · mendeleev's law · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 w latin small letter w U+0077