how many valencies do cobalt have and why?
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cobalt has two in its outer shell, but the seven others in the d orbital are also considered valence electrons.
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atomic number of cobalt= 27
electronic configuration is 2, 8,8,8,1
so valency is 1
electronic configuration is 2, 8,8,8,1
so valency is 1
beacoolguyhrisp83c2i:
This is wrong!
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