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Assessment
What fundamental concept in physics did Niels Bohr introduce to explain atomic structure?
Quantum theory
Classical mechanics
Relativity
Electromagnetism
Which of the following models did Niels Bohr create to describe the hydrogen atom?
Planetary model
String model
Solid sphere model
Wave model
What key principle did Bohr introduce regarding the energy levels of electrons?
Electrons can only exist in discrete energy levels.
Electrons can exist anywhere around the nucleus.
Energy levels vary continuously.
Electrons do not have defined energy levels.
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