Question

How did the modern periodic table overcome the demerits of Mendeleeve's periodic table ??

Answer 1

Answer:

${\green{\text{The Modern Periodic Table could remove various anomalies of Mendeleevs Periodic Table:}}}$

IT ALSO OVERCAME MANY OTHER PERIODIC TABLES SUCH NEWLAND'S OCTAVES AND DOBERENEIR'S TRIADS....

a) In the Modern Periodic table elements are arranged in the increasing order of their atomic number, removing the anomaly regarding certain pairs of elements in Mendeleevs periodic table.

b) Atomic number of cobalt is 27and nickel is 28. Hence cobalt will come before nickel even though its atomic mass is greater.

c) All isotopes of the same elements have different atomic masses, but same atomic number; therefore they are placed in the same position in the modern periodic table.