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3. 31 Electron affinity The uorine atom has the electronic conguration [He]2.92p5. The F atom can actually capture an electron to become a F' ion, and release energy, which is listed as its electron afnity, 328 id mol_'. We will assume that the two 1.9 electrons in the closed K shell [very close to the nucleus] and the two electrons in the 2s orbitals will shield four positive charges and thereby expose +98 46 = +5.? for the 2p orbital. Suppose that we try to calculate the energy of the F_ ion by simply assuming that the additional electron is attracted by an effective positive charge, +(5 Zzp) or +eZeffmivc, where 224., is the overall shielding effect of the ve electrons in the 2p orbital, so that the tenth electron we have added sees an effective charge of +eZcmi,.B. Calculate Z4, and Zemm. The F atom does not enjoy losing an electron. The ionization energy of the F atom is 168l 1d Incll. What is the Zeffm-WE that is experienced by a 2,0 electron?l (Note: I kJ mol_1 = 0.0!036 eratom.)