Question

Give two acevements of the mendeleev's periodi classdi eation

Answer 1

he left gaps in his periodic table predicting that elements found in the future would fill these gaps

inert gases discovered later could be placed in his table without disturbing the existing order

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thank u
@spyder

Answer 2

His table contains 8 vertical column called groups and 6 horizontal rows call period and also he left some gaps to fill other elements which would not discovered at that time thank you plz brainlist