To what volume would I need to add water to the evaporated solution in problem 3 to get a solution with a concentration of 0.50 M?

It would be (at) + cu (s)

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.