periodic law

Introduction

periodic law, statement of a periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number. Such an arrangement in the form of a table in which the groupings of elements having similar properties are easily identified is called the periodic system or the periodic table.

Sections in this article:

Introduction
Introduction of Atomic Numbers
The Periodic Table
Laws of Triads and of Octaves

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