Solution: It is possible to find instances in Mendeleev ′s Periodic Table in which elements with higher atomic masses are put before ones with lower atomic masses, and vice versa. As a result, items with similar qualities were grouped together to make sure they were not confused with one another. Thus, Cobalt was placed above Nickel, despite the fact that Cobalt has a greater atomic number than Nickel.
In Mendeleev’s Periodic Table the elements were arranged in the increasing order of their atomic masses. However, cobalt with an atomic mass of 58.93 amu was placed before nickel having an atomic mass of 58.71 amu. Give a reason for the same.
In Mendeleev’s Periodic Table the elements were arranged in the increasing order of their atomic masses. However, cobalt with an atomic mass of 58.93 amu was placed before nickel having an atomic mass of 58.71 amu. Give a reason for the same.