who proposed the modern periodic law? in which year? what was his finding?
Answers
Dmitri Mendeleev proposed the modern periodic law, in the year 1869. Mendeleev found that, when all the known chemical elements were arranged in order of increasing atomic weight, the resulting table displayed a recurring pattern, or periodicity, of properties within groups of elements.
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Answer:
The modern Periodic law can be stated as:
“The physical and chemical properties of the elements are periodic functions of their atomic numbers”.
The modern periodic table is developed after the periodic law and a periodic table given by Mendeleev.In the latter part of the 18th century, Mendeleev made his periodic table. Scientists did not know about the internal structure of the atom back then.
The development of various atomic models and advances in quantum theory revealed that the atomic number is the most basic property of a chemical element. This led to the modification of Mendeleev’s periodic law, which is today called as modern periodic law.
In 1869, Dmitri Mendeleev and Lothar Meyer established the periodic law independently. The first periodic table was developed by Mendeleev and soon followed by Meyer. Each grouped the elements by their mass and proposed regularly reoccurring those properties.
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