What is Mendeleeffs periodic law?

What are the limitations of Mendeleeff's periodic law ? Give any four of them.

Which of the following is the limitation is Mendeleeff's periodic table ?

………….,………are anomalous pair of elements in Mendeleeff's periodic table.

PASSAGE - 1: In Mendeleeff's periodic table elements were classified on the basis of atomic weight & in modern periodic table on the atomic number. The lighter elements of 2 & 3 periods show similarities in their properties called diagonal relationship 1. Which of the following element is not present in Mendeleeff's periodic table

What are the limitations of mendeleeff's periodic table ?

Comment on Mendeleeff's periodic table.

The following are some statements about Mendeleeff's periodic table i) It is based on increasing order of atomic numbers ii) Mendeleeff corrected the atomic weight of some elements like Be, In etc iii) (Ar,K), (Co,Ni), (Te,I) are three inverted pairs

Explain the salient features and achievements of the Mendeleeff’s periodic tble.