Question

compare and contrast the arrangement of element in the mandeleevs periodic table and the modern periodic table.
and plzz its urgent and i will you mark you brainliest also

Answer 1

In mandeleeve periodic table The physical and chemical properties of elements are the periodic function of atomic mass
But in modern periodic table properties of elements are the periodic function of atomic no.
Mandeleeve make 8 groups and dividee 7 groups into A and B. but in modern periodic table there are 18 groups.
Mandeleeve didn't clear the positions of isotopes.but in modern periodic table position of isotopes resolved.
Mandeleeve couldn't explain why properties of elements repeated after a regular interval time.but in modern periodic table it is resolved because the electronic configuration of outermost shell of elements repeats ay regular interval.
I hope it will help u...