Different atomic models were proposed to explain the distributions of charged particles in an atom. Two of these models proposed by J.J. Thomason and Ernest Rutherford are discussed below.
Similarities
- Both models explain the presence of positively charged and negatively charged particles.
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Thomson's model indicates that atoms have a spherical shape. Rutherford's model indicates that electrons are revolving around the nucleus, which is a sphere shape.
- Both models state that positively and negatively charged particles are held together by the electrostatic force of attraction.
Differences
- Thomason's Plum pudding model describes that atom possess a spherical shape in which positive charges are distributed uniformly. Rutherford's model states that positively charges particles concentrates on the center called the nucleus.
- Thomason's model does not give any idea about the nucleus and Rutherford's model explains about the nucleus.
- Thomason's model states that electrons are embedded in positively charged particles. In Rutherford's model electrons are revolving around the nucleus in a circular path called orbits.
Hence, we can conclude that the key difference is that, Thomason's model does not give any idea about the nucleus and Rutherford's model explains about the nucleus.
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