The units for ionization energy, which is often represented as ΔH₁, are kilojoules per mole (kJ/mol) or electronvolts (eV). In chemistry, it's commonly expressed in kJ/mol to indicate the energy required to remove an electron from a mole of gaseous atoms, while eV is frequently used in physics contexts to describe the energy for a single atom.
Ionization energy is represented by a symbol ∆H1 whose unit is?
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