Neils Bohr

Niels Bohr was a Danish physicist who developed a foundational model of the atom in 1913. He proposed that electrons orbit the nucleus in specific, quantized energy levels, similar to planets orbiting the sun but with defined distances. When electrons jump between these levels, they absorb or emit precise amounts of energy, which explains atomic spectra. Bohr's work was crucial in advancing quantum theory and understanding atomic structure, laying the groundwork for modern physics and chemistry. His insights helped explain why atoms behave the way they do and contributed significantly to the development of quantum mechanics.