An atom of iron is represented by 5726fe. how many neutrons are in the nucleus of this atom?

Based on the element given, Fe has an electron of 26 and protons of 26. Therefore the neutrons of the Fe element is 30 or in most cases 26. 

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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.