Who devised the original model of the atom?

The original model of the atom was devised by John Dalton in the early 19th century. However, if we focus on the developments specific to atomic theory, Niels Bohr significantly advanced the understanding of atomic structure with his model in the early 20th century. Bohr's model introduced the idea of quantized energy levels for electrons orbiting the nucleus, which helped explain how atoms emit and absorb energy in the form of light. His approach allowed for a better understanding of spectral lines and laid the groundwork for modern quantum mechanics.

While Albert Einstein, Max Planck, and Robert Hooke made significant contributions to physics and science as a whole, their work is not directly tied to the foundational atomic model in the same way as Bohr's is. Einstein is known for his theories of relativity, Planck for quantum theory, and Hooke for his law of elasticity, all of which are important in their respective areas but do not specifically focus on the atomic model in the way Bohr’s contributions do.