Oppositely charged objects attract each other. this attraction holds electrons in atoms and holds atoms to one another in many compounds. however, ernest rutherford’s model of the atom failed to explain why electrons were not pulled into the atomic nucleus by this attraction. what change to the atomic model helped solve the problem seen in rutherford’s model? bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder. bohr’s work with cathode rays led him to say that the electrons were located within the mass of positive material, like plums in a pudding. thomson’s work with cathode rays led him to say that the electrons were located within the mass of positive material, like plums in a pudding. thomson’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.

The deficiency in Ernest Rutherford’s model of the atom about electron orbits was solved by Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder; option A.

What are atomic models?

Atomic models are those models which were used to describe the structure of atoms by various scientists.

The models of the atom include:

Thompson's plum pudding model
Rutherford's planetary model
Bohr's model

Because of certain deficiencies found in the atomic models by the various scientists, several modifications were made on the atomic model.

The fact that Ernest Rutherford’s model of the atom failed to explain why electrons were not pulled into the atomic nucleus was explained by Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.

In conclusion, atomic models were used to explain the structure of atoms.

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