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Which of the following have no unit?

(i) Electronegativity

(ii) Electron gain enthalpy

(iii) Ionisation enthalpy

(iv) Metallic character 

Answers (1)

The answer is the option (i) and (iv)

Explanation: Electronegativity of an element is the tendency of an atom of that element to attract shared electrons towards itself, and unlike ionisation enthalpy and electron gain enthalpy, it is not a measurable quantity.

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