Electron gain enthalpy, also known as electron affinity, is the energy change that occurs when a neutral atom gains an electron to form a negative ion. It's a measure of how much an atom's affinity for electrons changes when it gains an electron. Positive values of electron gain enthalpy indicate that energy is released during the process, while negative values indicate that energy is absorbed.
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the amount of energy released when an electron is added to an isolated gaseous atom.
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Answer:
Electron gain enthalpy, also known as electron affinity, is the energy change that occurs when a neutral atom gains an electron to form a negative ion. It's a measure of how much an atom's affinity for electrons changes when it gains an electron. Positive values of electron gain enthalpy indicate that energy is released during the process, while negative values indicate that energy is absorbed.
Explanation: