Question

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Write about Mendeleeff's periodic law (in points, well-explained)
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Answer 1

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Mendeleeff's periodic law states that the properties of the elements are the periodic functions of their atomic weights

⇒ Acc. to Mendelleeff's periodic law the properties of the elements get repeated every after some particular number

⇔ The properties which are getting repeated every after some particular interval are called periodic properties

⇒ Mendeleeff arranged the elements in the increasing order of atomic weights

⇔ There are 18 vertical columns and 7 horizontal rows in Mendeleeff's periodic table

⇒ Horizontal rows are periods

⇔ Vertical columns are groups ( 1 to 8)

⇒ Groups are sub-divided into A and B

⇔ There were some defects found in Mendeleeff's periodic table

⇒ To overcome those defects, Moseley then attempted the classification of elements in the Modern Periodic Law then the elements were classified in Modern Periodic Table ...

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