question_answer 106)

                                                Match the properties given in Column I with the metals given in Column II.

Column 1 (Property)	Column 11 (Metal)
A. Element with highest second ionisation enthalpy B. Element with highest third ionisation enthalpy C. M in D. Element with highest heat of atomisation	1. Col   2. Cr    3. Cu, 4. Zn   5. Ni

         

Answer:

                                    A.®(3)    B.®(4) . C.®(2)    D.®(1)          . A. Cu+ = 3d10 which is very stable configuration due to full-filled orbitals. Hence, removal of second electron requires very high energy. B. Zn2+ = 3d10 which is very stable configuration. Hence, removal of third electron requires very high energy. C. Metal carbonyl with formula  is. D. Nickel is the element with highest heat of atomisation.