KCET · Chemistry · Classification of Elements and Periodicity in Properties
The third ionisation enthalpy is highest in
- A alkali metals
- B alkaline earth metals
- C chalcogens
- D pnictogens
Answer & Solution
Correct Answer
(B) alkaline earth metals
Step-by-step Solution
Detailed explanation
The third ionisation enthalpy is highest in a alkaline earth metals because it achieves stable noble gas configuration after removal of two electrons. Further removal of electron from the completely filled orbital require high ionisation enthalpy.
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