Nina Z. answered • 01/20/20
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The ionization energy is the energy that is required to remove an electron from a gaseous atom when the atom is in its ground state. When an atom has a higher ionization energy, it requires a lot energy to remove an electron, and the atom is stable and has a lower reactivity. When an atom has a lower ionization energy, it requires less energy to move the electron, and it is not stable and has a higher reactivity.
