Question

explain the criteria for the classification in Mendeleev periodic table also mention its achievement

Answer 1

Mendeleev’b periodic table was based on the observation that properties of the elements are a periodic function of their atomic masses. This means that if elements are arranged in the increasing order of their atomic masses, then elements with similar properties get their place in the same group in a successive increasing order of atomic masses.
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Answer 2

Hey mate


Mandeleeves peridic table was based on the periodic law which states that

physical and chemical properties are periodic function of thier atomic mass

As it was based on the atomic mass
and by this creteria he arranged the elemments in increasing order of thier atomic massz


Hope it helps u ^_^.....