Multiple Choice
In the simplified Bohr model of the atom, which scientist proposed that electrons occupy discrete energy shells (quantized energy levels) around the nucleus?
9. Electrons in Atoms and the Periodic Table
Bohr Model (Simplified)
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In the simplified Bohr model of the atom, what happens when an electron absorbs energy?
A
The nucleus gains the absorbed energy and the electron is pulled into a smaller orbit.
B
It moves from a higher-energy orbit to a lower-energy orbit and emits a photon.
C
It moves from a lower-energy orbit to a higher-energy orbit (excited state).
D
It remains in the same orbit but begins orbiting faster with no change in energy level.
Verified step by step guidance1
Recall the basic principle of the Bohr model: electrons orbit the nucleus in specific energy levels or orbits, each with a fixed energy.
Understand that when an electron absorbs energy, it gains that energy and moves to an orbit with higher energy, which is farther from the nucleus.
Recognize that moving to a higher-energy orbit means the electron is in an excited state, which is less stable than the ground state (lowest energy orbit).
Note that the nucleus does not gain the absorbed energy; instead, the energy is used by the electron to jump to a higher orbit.
Remember that if the electron loses energy, it will move back to a lower-energy orbit and emit a photon, but absorption causes the opposite transition.
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