periodic law

The periodic table is a tabular method of displaying the chemical elements. Although earlier precursors exist, its invention is generally credited to the Russian chemist Dmitri Mendeleev in 1869. The table is a visual representation of the periodic law which states that certain properties of elements repeat periodically when arranged by atomic number. The table arranges elements into vertical columns (Groups) and horizontal rows (Periods) to display these commonalities.
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The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.
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Noun
1. (chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbers
(synonym) Mendeleev's law
(hypernym) law, law of nature
(classification) chemistry, chemical science

The periodic law states that physical and chemical properties of the elements recur in a regular way when the elements are arranged in order of increasing atomic number.

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Eng: periodic law
Urdu: جدولی قانون ۔