Question

Is cobalt and nickel are similar in properties ? As they are placed in same group according to New land`s

Answer 1

The Iron Triad is composed of three elements: iron (Fe), cobalt (Co), and nickel (Ni), which share similar chemical and physical characteristics.


cobalt and nickel were placed in the same slot but in the column of fluorine, chlorine and bromine. But cobalt and nickel have properties quite different from fluorine, chlorine and bromine. Similarly, iron which has resemblances with cobalt and nickel in its properties has been placed for away from these elements.which was a limitation of newlands work.