Question

N
Q.11 In Mendeleev's Periodic Table, the element were arranged in
the increasing order of their atomic masses. However, cobalt with
atomic mass of 58.93 amu was placed before nickel having an
atomic mass of 58.71 amu. Give reason for the same.​

Answer 1

Answer:

this is the drawback of mendeleev's periodic table.he placed elements with more atomic mass first and then the less one