Electronegativity, electron affinity, and ionization energy are used to predict whether two atoms will bond and what kind of bond it will be. Match the correct definition to each term.The energy absorbed or released when a neutral atom loses one electron:

First ionization energy is the energy required to remove one electron from a neutral atom in the gas phase. Electron affinity describes the energy change when an atom gains an electron, while electronegativity measures how strongly an atom attracts shared electrons in a bond. Therefore, the correct choice is first ionization energy.

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