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Write a long answer to the following questions in a few more sentences
Give an account of the process adopted by Mendeleev ′ for the classification of elements. How did he arrive at “Periodic Law”?
(i) During Mendeleev’s time, only elements were known.
(ii) Mendeleev examined the correlation between properties and atomic masses of elements.
(iii) For this, he concentrated on compounds that were formed by the elements with and oxygen.
(iv) He selected hydrogen and because these elements make a compound with most of the other elements.
(v) Mendeleev made cards and wrote the name of an element on each card along with the chemical properties of a particular element.
(vi) Then, he pinned those cards on a wall. He could observe that most elements could be arranged in the periodic table in increasing order of their .
(ii) Mendeleev examined the correlation between properties and atomic masses of elements.
(iii) For this, he concentrated on compounds that were formed by the elements with and oxygen.
(iv) He selected hydrogen and because these elements make a compound with most of the other elements.
(v) Mendeleev made cards and wrote the name of an element on each card along with the chemical properties of a particular element.
(vi) Then, he pinned those cards on a wall. He could observe that most elements could be arranged in the periodic table in increasing order of their .
That is how Mendeleev arrived at “Periodic law”. Mendeleev’s Periodic Law states that the properties of elements are periodic functions of their .
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