Ch 101 notes 9-14

Ch 101 notes 9-14 - Electron configurations of anions and...

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Metals Non- metals Electron configurations of anions and cations . Section 4.1 A nonmetal _________________electron(s) to become a(n) ______________________ which is isoelectronic with its nearest noble gas. GAINS ANION Hi EN Lo EN Goal: Gain or lose e-s to get a Noble Gas Core A metal _________________electron(s) to become a(n) ______________________ which is isoelectronic with its nearest noble gas. LOSES CATION grabbers givers Predicting charges of anions and cations . Section 4.1 The charge on the cation = # e - s lost. The charge on the cation = family #. Al is group 3 ! Al 3+ The charge on the anion = # e - s gained. The charge on the anion = family # - 8. S is group 6 ! S 2- What is the expected charge on a Rb cation? What is the expected charge on a P anion? Electron Configuration of Cations Valence e-s in highest n quantum number are lost first. When valence e-s have the same n, the e-s in the highest l quantum number are lost first. Section 4.2 Any engineer knows the e-s are NOT removed in the reverse order they came in. Remove valence p, then s, then d. Na Ca Zr In [Ne] 3s 1 [Ar] 4s 2 Element e- config Cation e- config [Kr] 5s 2 4d 2 Mn [Ar] 4s 2 3d 5 [Kr] 5s 2 4d 10 5p 1 Electron Configuration of Cations Na 1+ [Ar] Ca 2+ Zr 2+ [Kr] 4d 2 Mn 2+ [Ar] 3d 5 In 1+ [Kr] 5s 2 4d 10 [Kr] 5s 2 4d 10 5p 1 In 3+ [Kr] 4d 10 Section 4.2 [Ne] Cl Se N [Ne] 3s 2 3p 5 [Ar] 4s 2 3d 10 4p 4 Element e- config Anion e- config [He] 2s 2 2p 3 F[ H e ] 2 s 2 2p 5 Electron Configuration of Anions Cl 1- Section 4.2 [Ne] 3s 2 3p 6 [Ar] or Se 2- [Ar] 4s 2 3d 10 4p 6 or [Kr] N 3- [He] 2s 2 2p 6 or [Ne] F 1- [He] 2s 2 2p 6 or [Ne] The new e-s go in the lowest energy orbital that is available.
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Things that Make you go HMMM Na 1+ [Ne] N 3- [Ne] Mg 2+ [Ne] O 2- [Ne] F 1- [Ne] Ion e- config Ion Section 4.2 What is the expected charge on Se and the electron configuration of that ion? What is the expected charge on Mg and the electron configuration of that ion?
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Ch 101 notes 9-14 - Electron configurations of anions and...

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