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Multiple Choice
In the context of electronic structure, what does the electron cloud model of the atom describe?
A
All atomic mass and positive charge are spread uniformly throughout the atom with electrons on the surface.
B
Electrons are embedded in a uniform sphere of positive charge (plum pudding model).
C
Electrons occupy regions of probability around the nucleus rather than fixed circular paths.
D
Electrons move in definite circular orbits with quantized radii and energies only (Bohr model).
Verified step by step guidance
1
Understand that the electron cloud model is a way to describe where electrons are likely to be found around the nucleus of an atom.
Recognize that unlike earlier models (such as the Bohr model), the electron cloud model does not depict electrons moving in fixed, circular orbits.
Know that the electron cloud represents regions of space where there is a high probability of finding an electron, based on quantum mechanics.
Realize that these regions are often visualized as fuzzy clouds rather than precise paths, reflecting the uncertainty in an electron's exact position.
Conclude that the electron cloud model emphasizes probability distributions of electrons around the nucleus, rather than fixed orbits or uniform charge distributions.