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Q. 6
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the physical and chemical properties of elements are physicals are what is the nature of elements like if they are metal or non metal or gases and chemical properties are according to their atomic no. their atomic masses and etc .
THE TWO OBJECTIV THAT GIVES CHALLENGE TO MENDELEEV ARE..
1.HE DID NOT ARRANGE THE PLACE OF HYDROGEN AT RIGHT PLACE
2.THEY KEPT THE COBALT AND NICKLE IN ACCORDING TO DECREASING MASS AND HE DIDIN'T RESPONSE ABOUT IT
THE TWO OBJECTIV THAT GIVES CHALLENGE TO MENDELEEV ARE..
1.HE DID NOT ARRANGE THE PLACE OF HYDROGEN AT RIGHT PLACE
2.THEY KEPT THE COBALT AND NICKLE IN ACCORDING TO DECREASING MASS AND HE DIDIN'T RESPONSE ABOUT IT
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