QuestionMay 9, 2026

A major component of modern atomic theory is based on models that illustrate the structure of an atom. Describe two changes that happened to the atomic model based on the experiments of Dalton,Rutherford, Thomson, or Bohr.

A major component of modern atomic theory is based on models that illustrate the structure of an atom. Describe two changes that happened to the atomic model based on the experiments of Dalton,Rutherford, Thomson, or Bohr.
A major component of modern atomic theory is based on models that illustrate the structure of an atom. Describe two changes that happened to the atomic model based on the experiments of Dalton,Rutherford, Thomson, or Bohr.

Solution
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Answer

Dalton's model introduced indivisible atoms; Thomson's model added electrons. Explanation 1. Dalton's Atomic Model Dalton proposed that atoms are indivisible particles, forming the basis of matter. His model suggested atoms of different elements vary in size and mass. 2. Thomson's Atomic Model Thomson discovered electrons, leading to the "plum pudding" model where electrons are embedded in a positively charged sphere. 3. Rutherford's Atomic Model Rutherford's gold foil experiment revealed a dense nucleus, leading to the model where electrons orbit a central nucleus. 4. Bohr's Atomic Model Bohr introduced quantized electron orbits, explaining atomic emission spectra and stability of electron paths.

Explanation

1. Dalton's Atomic Model<br /> Dalton proposed that atoms are indivisible particles, forming the basis of matter. His model suggested atoms of different elements vary in size and mass.<br />2. Thomson's Atomic Model<br /> Thomson discovered electrons, leading to the "plum pudding" model where electrons are embedded in a positively charged sphere.<br />3. Rutherford's Atomic Model<br /> Rutherford's gold foil experiment revealed a dense nucleus, leading to the model where electrons orbit a central nucleus.<br />4. Bohr's Atomic Model<br /> Bohr introduced quantized electron orbits, explaining atomic emission spectra and stability of electron paths.
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