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periodic law

[ peer-ee-od-ik, peer- ]

noun

, Chemistry.
  1. the law that the properties of the elements are periodic functions of their atomic numbers.
  2. Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.


periodic law

/ ˌpɪərɪˈɒdɪk /

noun

  1. Also calledMendeleev's law the principle that the chemical properties of the elements are periodic functions of their atomic weights or, more accurately, of their atomic numbers
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of periodic law1

First recorded in 1870–75

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periodicityperiodic motion