* Nucleus: He proposed that the atom has a small, positively charged nucleus at its center, containing protons and neutrons.
* Electrons in orbits: Electrons orbit the nucleus in specific, quantized energy levels, like planets orbiting the sun. These orbits are called electron shells.
* Energy levels: Each electron shell has a specific energy level. Electrons can jump between shells by absorbing or emitting energy (light).
* Quantization: The energy levels of the electron shells are quantized, meaning electrons can only exist at specific energy levels. They cannot exist in between these levels.
* Quantum leaps: When an electron jumps from a higher energy level to a lower one, it emits light with a specific frequency (color). Conversely, when an electron absorbs light of the correct frequency, it can jump to a higher energy level.
Important Note: While the Bohr model was a significant improvement over previous models, it has limitations. It can't explain the spectra of more complex atoms, and it doesn't account for the wave-like nature of electrons. More advanced models like the quantum mechanical model have replaced the Bohr model, but it's still a valuable tool for understanding the basics of atomic structure.
