1.

State Mendeleev's periodic law. Write two achievements of Mendeleev's periodic table.

Answer»

Solution :Mendeleev.s PERIODIC Law : "PROPERTIES of elements are the periodic function of their ATOMIC masses."
Achievements :
(i) It could classify all the elements discovered at that time.
(II) It helped in discovery of new elements.
(iii) It helped in CORRECTION of atomic mass of some of the elements.


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