Question

problem 13
why do different types of atoms (elements) give off or absorb different spectral lines?
because some atoms do not have a ground state, while others have three or four.
because the spacing of the energy levels is different in different atoms.
in some elements, electrons can only move to odd - numbered levels, in others only to even - numbered ones.
in heavier elements, diffraction spreads out the lines that the atom produces, making the colors different.
all elements have the same lines, but they are doppler shifted by different amounts.
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Explanation:

The spectral lines of atoms are related to the energy - level transitions of electrons. Different atoms have different energy - level spacings. When electrons transition between energy levels, they emit or absorb photons of specific energies (and thus frequencies or wavelengths, corresponding to spectral lines). So, the spacing of the energy levels is different in different atoms.

Answer:

Because the spacing of the energy levels is different in different atoms.