The coefficients are missing from the skeleton equation: Cr + Fe(NO3)2 -> Fe + Cr(NO3)3. When balanced, the SUM of all the coefficients is .

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.