Halogens on the periodic table shows more positive values of Electron Affinity (E EA). More the positive values of Electron Affinity (E EA), more is the energy released. For neutral process (i.e when energy is neither absorbed nor released), the value of Electron Affinity (E EA) will be zero.Hence the sign of Electron Affinity (E EA ) will be negative. For endothermic reaction (i.e when energy is absorbed), the change in energy (ΔE) is positive.Hence the sign of Electron Affinity (E EA ) will be positive. For exothermic reaction (i.e when energy is released), the change in energy (ΔE) is negative.And if ΔE is negative, then E EA will be positive. In simple words, if ΔE is positive, then E EA will be negative. This energy change (ΔE) can be positive, negative or zero.Īnd the sign of Electron Affinity (E EA) is opposite to the sign of energy change (ΔE). And this amount of energy change (ΔE) is called electron affinity.
In other words, when the electron is added to a neutral atom, the energy is either released or absorbed. Values in parentheses ( ) are predicted values.Įlectron affinity is the amount of energy change (ΔE) that occurs when an electron is added in the outermost shell of an isolated gaseous atom. The values of electron affinity are given in kJ/mol. Periodic table with electron affinity values is shown above.
0 kommentar(er)
