摘要：Ionization energy is the energy require to remove oneelectron from an atomor ion, increasing its charge. It is defined as theentha

Ionization energy is the energy require to remove one electron from an atom or ion, increasing its charge. It is defined as the enthalpy change when one mole gaseous atoms form gaseous ionswith positive charges. There are a number of factors that will affect the ionisation energy of an atom (or ion), as well as trends in these energies both within atoms and across periods.

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