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Assessment
What model of the atom is Niels Bohr best known for introducing?
Planetary Model
Quantum Mechanical Model
Thomson Model
Solid Sphere Model
What key principle did Bohr's model of the atom rely on?
Electrons move in fixed orbits around the nucleus.
Atoms are indivisible and indestructible.
The positive charge is spread out in a 'pudding' around the electrons.
Electrons can exist in any location around the nucleus.
In Bohr's model, what happens when an electron jumps from a higher energy level to a lower one?
It emits energy as a photon.
It gains mass.
It disappears.
It does not change.
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