Which of the following has no unit?

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(A) Electronegativity $(EN)$ is a dimensionless property defined as the relative tendency of an atom to attract a shared pair of electrons towards its

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Electronegativity $(EN)$

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(A) Electronegativity $(EN)$ is a dimensionless property defined as the relative tendency of an atom to attract a shared pair of electrons towards itself in a covalent bond.
Electron Affinity $(EA)$ and Ionization Potential $(IP)$ are measured in units of energy (e.g., $kJ \ mol^{-1}$ or $eV \ atom^{-1}$).
Atomic Radius $(AR)$ is measured in units of length (e.g., $pm$ or $\mathring{A}$).
Therefore, $EN$ has no unit.

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