Question

What is Mendeleev periodic law? write any three important aspects.


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Answer 1

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• Dmitri Ivanovich Mendeleev was a Russian chemist and inventor. He is best remembered for formulating the Periodic Law and creating a farsighted version of the periodic table of elements

Main features of Mendeleev's Periodic Table:

1. (a) There are seven horizontal rows in the periodic table. They are called periods and are numbered from 1 to 7.
2. (b) In a given period, there is a regular gradation in the properties of elements from left to right.
3. (c) There are eight vertical columns in the periodic table. These are named as groups. They are numbered from I to VIII. Groups I to VII are subdivided into subgroups A and B.

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Answer 2

Answer:

The Mendeleev's periodic law states that " The properties are a periodic function of their atomic mass." by using the atomic mass as the concept periodic classification of elements can be arranged in a groups.

Explanation:

Merits of Mendeleev Periodic Table. Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.