Your lab keeps a stock solution of potassium chloride with a concentration
of 4.50 M. What volume of this solution would you dilute to prepare 1.00 L
of a 0.900 M KCI solution?

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.

The density would be 1.622