Which one of the following could not be explained by Rutherford's nuclear model ?

Rutherford's nuclear model, proposed in 1911, successfully identified that an atom has a small, dense, positively charged nucleus at its center [1]. He also estimated the size of the nucleus (10⁻¹⁵ m to 10⁻¹⁴ m) relative to the atom. However, the model failed to explain the stability of the atom [3]. According to classical electromagnetic theory, an electron revolving in a circular orbit is an accelerating charged particle that should continuously radiate energy. This loss of energy would cause the electron to spiral inward and eventually collapse into the nucleus, making the atom unstable. Since atoms are known to be stable, this was a major drawback of his planetary model [3]. This limitation was later addressed by Niels Bohr, who introduced quantized orbits where electrons do not radiate energy.

Sources

1. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 12: Major Crops and Cropping Patterns in India > Glossary > p. 100
2. [3] https://www.britannica.com/science/Rutherford-model