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Ionization Enthalpy

The element w...

Question

The element with lowest $I E_{1}$ is:

sodium

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cesium

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barium

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magnesium

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Solution

The correct option is C cesium
In this cesium is most electropositive element. it tends to loose its electron. Therefore its ${I E}_{1}$ is Ionization energy which is energy required to remove outermost electron.

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