Answer:
The idea that atoms are unstable would have been strengthened because the orbiting electron would lose energy and fall into the nucleus.
Step-by-step explanation:
Based on classical mechanics an electron would spiral and fall on the nucleus thus collapsing the atom. But it was quantum mechanics that proposed that electrons move in definite orbits around the nucleus. Electrons absorb a definite quantum of energy and move from a lower state to an excited state. Also electrons release a definite quantum of energy and move from excited to more stable state.