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| 1. |
In the series Sc(Z= 21) to Zn ( Z= 30),the enthalpy of atomisation of zinc is the lowest , i.e., 126 kJ mol^(-1) . Why ? |
| Answer» SOLUTION :In the series , Sc to Zn , all ELEMENTS have one or more unpaired electrons except zinc which has no unpaired electron as its outer electronic CONFIGURATION is `3d^(10)4s^(2)`. Hence, atomic intermetallic bonding ( METAL - metal bonding) is WEAKEST in zinc. Therefore, enthalpy of atomisation is lowest. | |