How is a pure substance different from a mixture? a. pure substances cannot be seperated by physical means. b. a pure substance is heterogeneous. c. a mixture is made of ine substance. d. mixtures cannot be seperated by physical means.

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.