Question

describe the merites of mendeleev periodic table.

Answer 1

mendeleev kept vacant place in his periodic table for the elements which are discovered in future and to name that element with their upper element.mendeleev created zero group for noble gas group.atomic mass of some elements are revised to place than properly.most important mendeleev periodic table are based on atomic mass.

Answer 2

Merits of mendleev's periodic table are:
He made the study of elements easy and compact
He left gaps for undiscovered elements 
He predicted the properties of unknown elements by the help of neighbouring elements 
He corrected mass number of elements like gold and platinum

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