Question

✴Bonjour¡


∆Drawbacks of Doberior , New land and Mendeleev periodic table✖✖✖

​

Answer 1

DOBERIOR DRAWBACKS

1.all the known element could not be arranged in traids

NEWLANDS DRAWBACK

1.it was applicable only till calcium

2.he thought only 56 elements were there in nature and no more will be discovered

Mendeleev DRAWBACKS

1.position of hydrogen was placed in first group but it resembles first as well as seventh group in properties

2.anomalous pairs of elements

3.position of isotopes

2.separation of similiar but grouping of certain dissimiliar elements

PLEASE MARK AS BRAINLIST

HOPE U LIKE IT