PracticeSheet5 key

PracticeSheet5 key - Practice Sheet 5 BLC & DLC Answers...

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Practice Sheet 5 5B.1 a) O: 1s 2 2s 2 2p 4 or [He] 2s 2 2p 4 b) Cu: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 9 or [Ar] 4s 2 3d 9 c) Ca 2+ : 1s 2 2s 2 2p 6 3s 2 3p 6 or [Ar] d) V 2+ : 1s 2 2s 2 2p 6 3s 2 3p 6 3d 3 or [Ar] 3d 3 (the two 4s electrons are lost in forming the ion. This is technically correct, but if you follow the systematic pattern outlined in class you get the answer below which is also an acceptable answer.) OR V 2+ : 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1 or [Ar] 4s 2 3d 1 h) Pb 2+ : 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 or [Xe] 6s 2 4f 14 5d 10 (the two 6p electrons are lost in forming the ion) 5B.2 a) Be b) O c) Cr d) Te e) H 5D.1 a) Li paramagnetic – 1 unpaired 2s e - b) Mg 2+ diamagnetic – no unpaired e - [Ne] c) Cl paramagnetic – 1 unpaired 3p e - d) Ag + diamagnetic – configuration is [Kr]4d 10 so no unpaired e - OR Paramagnetic is also acceptable if you follow the system of determining electron configuration outlined in class which would be [Kr] 5s
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PracticeSheet5 key - Practice Sheet 5 BLC & DLC Answers...

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