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| 1. |
In the series Sc (Z = 21) to Zn (Z = 30), enthalpy of atomisation of zinc is the lowest, i.e., 126 kJ. Mol^(-1). Why ? |
| Answer» SOLUTION :In the above mentioned SERIES Sc (Z = 21) to Zn (Z = 30), all the METAL atoms have one or more unpaired electrons in their outermost shell. On the contry, ZINC `(3d^(10)4s^(2))` has no unpaired electron in the outershell, leading to very poor interatomic interactions. Therefore, enthalpy of atomisation of zinc is the lowest. | |