Multiple Choice
Which of the following electron configurations represents an atom in an excited state?
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10. Periodic Properties of the Elements
The Electron Configuration
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Which of the following best describes the electron cloud model?
A
It depicts electrons orbiting the nucleus in fixed circular paths.
B
It suggests that electrons have definite positions and velocities at all times.
C
It was first proposed by Niels Bohr in 1913.
D
It represents the probability of finding an electron in a certain region around the nucleus.
Verified step by step guidance1
Understand that the electron cloud model is a modern concept in atomic theory that describes the behavior of electrons around the nucleus.
Recall that earlier models, like Bohr's model, depicted electrons moving in fixed circular orbits, which is now known to be an oversimplification.
Recognize that the electron cloud model does not assign exact paths or positions to electrons but instead uses probability distributions to describe where an electron is likely to be found.
Know that this model is based on quantum mechanics and the solutions to the Schr\"odinger equation, which provide regions of space called orbitals where electrons are most likely located.
Therefore, the best description of the electron cloud model is that it represents the probability of finding an electron in a certain region around the nucleus.
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