The combined calcium and phosphorus in a pn should not exceed 45 meq/l. what is the combined calcium and phosphorus (there are 2 meq po4/mmol) in this pn order and is it considered safe?

The combined  calcium and phosphorus  given that there are 2 meq po4/mmol is equal to 30 meq/l. We just multiply the given data to the density of the combined elements. since the limit is 45 meq/l, then the dosage is considered as safe for the patient to have. 

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.