The metal having highest ionisation potential is :

lithium

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sodium

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potassium

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caesium

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Solution

The correct option is A lithium
On moving down the group, the atomic number of alkali metals increases and their ionization potential value decreases. Hence lithium has highest ionization potential value.

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Similar questions

The element having highest ionisation potential is:

Which element has the highest ionization potential and which has the lowest ionization potential?

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