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[問題] 1 Chem Q about valence electron of [Co(NH3)6]3+

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1 Chem Q about valence electron of [Co(NH3)6]3+

May I ask why the no. of valence electron of [Co(NH3)6]3+ is 18?? how to calculate it?? [I've drawn its Lewis structure but I don't know which electrons are considered as valence electrons... what's the rule at all?] it seems it's because there are 10 electrons in 3d, 2 electrons in 4s, and 6 electrons in 4p... then Zn has only valence electrons of 12??? [excluding 3s and 3p, which have the same principal quantum no. as 3d??? sounds weird]
Thanks!

[ 本帖最後由 庸才 於 2012-4-23 11:28 AM 編輯 ]
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VE=8???? 我亂UP ONLY

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