Periodic Law

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Periodic Law, in chemistry, law stating that many of the physical and chemical properties of the elements tend to recur in a systematic manner with increasing atomic number. Progressing from the lightest to the heaviest atoms, certain properties of the elements approximate those of precursors at regular intervals of 2, 8, 18, and 32. For example, the 2nd element (helium) is similar in its chemical behavior to the 10th (neon), as well as to the 18th (argon), the 36th (krypton), the 54th (xenon), and the 86th (radon). The chemical family called the halogens, composed of elements 9 (fluorine), 17 (chlorine), 35 (bromine), 53 (iodine), and 85 (astatine), is an extremely reactive family.

See Periodic Table of Elements

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Zayden Wood said…
Nobody can deny that periodic law is one of the most important concepts in chemistry. According to this law the elements are arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties Every Chemistry researcher and other chemists makes use of this law, whether consciously or not, when dealing with the chemical elements, and their chemical reactions. That's how periodic law led to the development of the modern periodic table. You have also discussed few such relationships among elements. Such little concepts are very beneficial for Chemistry students in their various exams like 'O' level Chemistry practical exams, high school Chemistry etc to prepare for their viva. Thanks for sharing.
November 26, 2021 at 11:26 PM
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