Question

plzz tell me the solution of this one
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Answer 1

b) Henry Mosley

c) the periodic law states that the elements are the periodic functions of their atomic masses.

a)DOBEREINER:-

ADVANTAGE: HE FOUND THE TRIADS.

DIS: THESE TRIADS WERE NOT APPLICABLE TO ALL ELEMENTS.

* MENDELEEV:-

ADVANTAGE: HE FOUND THE PERIODIC LAW.

DIS: HE DID NOT ADD HYDROGEN BEFORE.