Question

the modern atomic theory
quiz complete
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natalie observes these characteristics in the model of an atom.
(i) includes positive charge
(ii) contains electrons
(iii) explains the photoelectric effect
(iv) suggests the probable location of electrons
which model is natalie most likely examining?
bohr model
daltons model
plum pudding model
electron-cloud model

Explanation:

• Dalton's model only described indivisible positive atoms, no electrons or electron location.
• Plum pudding model had positive charge and embedded electrons but no explanation for the photoelectric effect or defined electron location.
• Bohr model placed electrons in fixed orbits, explained the photoelectric effect but did not use probable electron locations.
• The electron-cloud model includes the positive nucleus, electrons, accounts for the photoelectric effect via quantum principles, and describes electrons by their probable location in cloud-like regions.

Answer:

electron-cloud model