I'm not sure that valence is quite the right word to use for the analogy, but it's a good word and should be used none-the-less. In QM, you can say that some property is quantized but you don't generally don't dignify the differeing states with a particular name. As far as valences are concerned, they sort of describe the different energy levels that a given orbital can have. So, orbitals would probably be the more appropriate term and a valence would sorta be like the number of slots that a wizard had for spells in each level.