Who developed the planetary model of the atom?

Who developed the planetary model of the atom?

• A. Niels Bohr
• B. Ernest Rutherford
• C. J.J. Thomson
• D. Dalton

Answer: (A)

The planetary model of the atom was developed by Niels Bohr in 1913. This model suggests that electrons orbit the nucleus in defined paths, similar to how planets orbit the sun. Bohr's model built on earlier work by Ernest Rutherford, who proposed that atoms have a central nucleus. However, Rutherford's model did not specify how electrons were arranged around the nucleus. Bohr introduced the idea that these electrons occupy specific energy levels or orbits, providing a clearer understanding of atomic structure and the behavior of electrons in relation to energy absorption and emission. The significance of Bohr's model lies in its ability to explain the spectral lines observed in hydrogen, providing a quantum framework to the understanding of atomic structure. This marked a crucial advancement in atomic theory and laid the foundation for modern quantum mechanics.

The planetary model of the atom was developed by Niels Bohr in 1913. This model suggests that electrons orbit the nucleus in defined paths, similar to how planets orbit the sun. Bohr's model built on earlier work by Ernest Rutherford, who proposed that atoms have a central nucleus. However, Rutherford's model did not specify how electrons were arranged around the nucleus. Bohr introduced the idea that these electrons occupy specific energy levels or orbits, providing a clearer understanding of atomic structure and the behavior of electrons in relation to energy absorption and emission.

The significance of Bohr's model lies in its ability to explain the spectral lines observed in hydrogen, providing a quantum framework to the understanding of atomic structure. This marked a crucial advancement in atomic theory and laid the foundation for modern quantum mechanics.