Ionization energy is defined as which of the following?

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Study for the IMAT Chemistry Exam. Access flashcards and multiple choice questions; hints and explanations included for each question. Prepare effectively for your exam.

Multiple Choice

Ionization energy is defined as which of the following?

Explanation:
Ionization energy is the energy required to remove an electron from a neutral gaseous atom. The process is endothermic because you must supply energy to overcome the electrostatic attraction of the nucleus on the electron, yielding a positively charged ion and a free electron. It is not the energy released when a bond is broken (bond dissociation energy), nor the energy change when adding an electron to an atom (electron affinity). So, describing it as endothermic energy required to remove an electron correctly captures the concept.

Ionization energy is the energy required to remove an electron from a neutral gaseous atom. The process is endothermic because you must supply energy to overcome the electrostatic attraction of the nucleus on the electron, yielding a positively charged ion and a free electron. It is not the energy released when a bond is broken (bond dissociation energy), nor the energy change when adding an electron to an atom (electron affinity). So, describing it as endothermic energy required to remove an electron correctly captures the concept.

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