The ksp value for magnesium fluoride, mgf2, is 6.4 x 10-9 at 25 °c. what is its solubility at 25 °c?

4 S^3 = Ksp 
S ={ 1/4 Ksp}^1/3 
= [ 6.4/4 X 10^-9]^1/3 
= (1.6^1/3)*10^-3 
= 1.1696 x 10^-3 ANSWER

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.