Write two important limitations of Rutherford nuclear model of the atom.
Question
Write two important limitations of Rutherford nuclear model of the atom.
Solution
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The Rutherford model couldn't explain the stability of an atom: According to classical electromagnetic theory, a charged particle moving in a circular orbit would undergo acceleration. During acceleration, charged particles would emit energy. So, if an electron did move in a circular orbit, it would lose energy and eventually spiral into the nucleus. This would make the atom highly unstable. However, atoms are known to be stable entities.
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The Rutherford model couldn't explain the line spectrum of hydrogen: The model doesn't explain the discrete line spectra of elements. According to classical theory, an accelerating electron would emit electromagnetic radiation of all frequencies, leading to a continuous spectrum. However, the observed spectrum of hydrogen is a line spectrum, which is discrete. This discrepancy couldn't be explained by Rutherford's model.
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