1. The emission of energy due to acceleration causes the electron's orbit to decay, leading to its spiral into the nucleus in classical physics. This contradicts the observed stability of atoms and prompted the development of quantum mechanics.

    The emission of energy due to acceleration causes the electron’s orbit to decay, leading to its spiral into the nucleus in classical physics. This contradicts the observed stability of atoms and prompted the development of quantum mechanics.

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  2. The revolution of an electron in a circular orbit isn't expected to be stable due to classical electromagnetic theory, which predicts that accelerated charges emit energy, causing the electron to spiral into the nucleus.

    The revolution of an electron in a circular orbit isn’t expected to be stable due to classical electromagnetic theory, which predicts that accelerated charges emit energy, causing the electron to spiral into the nucleus.

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  3. The significant question scientists faced regarding the structure of atoms was how electrons could orbit the nucleus without collapsing into it, as classical physics predicted due to electromagnetic attraction.

    The significant question scientists faced regarding the structure of atoms was how electrons could orbit the nucleus without collapsing into it, as classical physics predicted due to electromagnetic attraction.

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  4. Protons were believed to be located in the interior of the atom because they carry positive charge, and their presence was necessary to balance the negative charge of electrons and maintain overall electrical neutrality.

    Protons were believed to be located in the interior of the atom because they carry positive charge, and their presence was necessary to balance the negative charge of electrons and maintain overall electrical neutrality.

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  5. The instability of the electron's orbit contradicts the stability of atoms as classical physics suggests electrons should spiral into the nucleus due to electromagnetic attraction. Yet, atoms remain stable due to quantum principles governing electron behavior.

    The instability of the electron’s orbit contradicts the stability of atoms as classical physics suggests electrons should spiral into the nucleus due to electromagnetic attraction. Yet, atoms remain stable due to quantum principles governing electron behavior.

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