Electron Gain Enthalpy Of Elements In Modern Periodic Table
Electron Gain Enthalpy Of Elements In Modern Periodic Table
Electron gain enthalpy is the energy change that occurs when an atom accepts an electron. It is generally a negative value, indicating that the process is exothermic. The electron gain enthalpy of elements generally becomes more negative down a group and more positive across a period in the modern periodic table. This is because the effective nuclear charge increases down a group and across a period, making it more difficult for an atom to accept an electron. The exceptions to this trend are the noble gases, which have a complete valence shell and therefore have a very positive electron gain enthalpy.
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