A Heavy Neutral Atom, Such as Iron, Produces Many Spectral

Multiple Choice

A heavy neutral atom, such as iron, produces many spectral lines compared to light elementslike hydrogen and helium. Why?

A) Because of the larger number of electrons and corresponding energy levels, more transitionsare possible.
B) Because of the larger number of electrons, there are many ionization levels possible.
C) Because of the larger number protons, the amount of force holding the electrons to the atomcan vary between different iron atoms.
D) Because of the atom's larger size, it will be hit by more photons in a beam of light.