PLZZZ HELPPP IM DOING A TEST On the periodic table, how is atomic mass
represented?
A. As the mass of the most common isotope
B. As the exact mass of every atom
C. As the masses of all the protons added together
D. As an average of the mass of different isotopes

The answer is D: as an average of the mass of different isotopes.

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.