Question

Write the merits and demerits of Mendeleev periodic table in points and explain each of them in short​

Answer 1

merits of mendeleev periodic table are:

1. it was first scientific and systamatic study of different element.
2. there were may gaps for in discovered elements.After their discovery the got their proper place in table.
3. with the help of mendeleev periodic table , properties of several elements were studied correctly.

demerits of mendeleev periodic table

1. it could not arrange hydrogen as it shows the property of both alkali and halogens.
2. it could not arrange isotopes because they have different atomic weight but same atomic number.
3. it could not arrange Lanthanides and Actinides.

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