7. What determines what type of element an atom is? amount of protons
amount of neutrons
amount of electrons

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.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).