A. it is a practical source of energy on earth
b. it occurs only outside the solar system
c. it’s product is heavier than each of its reactants
d. it shows the critical mass of an element

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 total number of nucleons