21. Because of their high ionization energy and almost zero electron affinity , they were not expected to be reactive. 22. The electron affinities of the radicals OH and SH are the most precisely known of all molecular electron affinities. 23. The electron affinities of the radicals OH and SH are the most precisely known of all molecular electron affinities . 24. Likewise, would the electron affinity of Cl-be related to that first ionization energy of Cl neutral? 25. The electron affinity of astatine is predicted to be reduced by one-third because of spin-orbit interactions. 26. Elements marked with an asterisk are expected to have negative or near-zero electron affinities on quantum mechanical grounds. 27. Fluorine and oxygen are particularly favoured due to their high electron affinity , high ionisation energy and consequently high electronegativity. 28. The ionization potential of noble gases in their lowest excited state is close to the electron affinity of halogen atoms. 29. Often negative electron affinity is desired to obtain efficient cathodes that can supply electrons to the vacuum with little energy loss. 30. It glows more than diamond when exposed even to low levels of energetic radiation because of its stronger negative electron affinity .
