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Byju's Answer
Standard XII
Chemistry
Introduction to Alkaline Earth Metals
Which one of ...
Question

Which one of the following has the highest ionization energy?

A
Li
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B
Na
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C
K
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D
Rb
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Solution

The correct option is A Li
These are the metals from group 1 elements. Going from top to bottom in a group, ionisation energy generally decreases, hence Li has the highest ionisation energy.

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