Multiple Choice
What is the electron configuration of the chloride ion (Cl⁻) after a chlorine atom gains an electron?
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10. Periodic Properties of the Elements
The Electron Configuration
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which statement about the electron-cloud model is true?
A
It suggests that electrons have definite positions and velocities at all times.
B
It describes the probability of finding an electron in a particular region around the nucleus.
C
It shows electrons moving in fixed circular orbits around the nucleus.
D
It was proposed by Niels Bohr to explain atomic spectra.
Verified step by step guidance1
Understand that the electron-cloud model is a quantum mechanical model of the atom that replaces the idea of fixed orbits with regions of probability.
Recall that in the electron-cloud model, electrons do not have definite positions and velocities simultaneously due to the Heisenberg Uncertainty Principle.
Recognize that the model describes the likelihood or probability of finding an electron in a certain region around the nucleus, rather than exact paths.
Note that fixed circular orbits are a feature of the Bohr model, not the electron-cloud model.
Remember that the electron-cloud model was developed after Bohr's model and is based on wave mechanics, not proposed by Niels Bohr.
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