Question

State the demerits of mendeleev's periodic table​

Answer 1

Answer:

• Grouping of dissimilar elemnts like Na, K, Rb grouped with Cu and Ag.
• Seperation of similar elements Pt and Au as they have similar properties.
• Discovery of isotpes
• Anomalous pair(Co and Ni) as atomic weight of Co is greater than Ni So, Ni should be placed before Ci.
• Position of hydrogen.

Explanation:

hope it will help u....

Answer 2

Answer:

Demirits of mendeleevs periodic table are as follows:

1) The elements cobalt and nickel have the same whole no. atomic mass. as a remit as Thier was an ambiguity regarding sequence in mendeleevs periodic table.

2) Isotopes were discovered long time after mendeleevs put the forth period table

I hope understand you...

plz marks as brsinlist questions