The modern periodic law The modern periodic law states that the properties of elements are periodic functions of their atomic numbers. This law builds upon the earlier observations made by Dmitri Mendeleev and Julius Lothar Meyer, who organized elements based on their atomic masses. The modern periodic law is an extension of Mendeleev’s original periodic […]

Introduction Before the development of the modern periodic table, several early attempts were made to classify and organize elements based on their properties. These early classification systems were significant steps toward understanding the relationships between elements. Here are some notable early attempts at the classification of elements: Döbereiner’s Triads Döbereiner’s Triads, proposed by German chemist