What are the 2 postulates of …

Ernest Rutherford's atomic model, also known as the Rutherford model, was proposed in the early 20th century. It is primarily based on two key postulates: 1. **The Nucleus**: Rutherford postulated that an atom consists of a tiny, dense, and positively charged core at its center, known as the nucleus. This nucleus contains most of the atom's mass and is where the positively charged protons are located. Electrons orbit around the nucleus. 2. **Electron Orbits**: Rutherford proposed that electrons orbit the nucleus in well-defined, circular or elliptical paths. These orbits are sometimes referred to as electron shells or energy levels. Electrons in different shells have different energy levels, and they can jump from one energy level to another by absorbing or emitting energy in the form of electromagnetic radiation. Rutherford's model was groundbreaking because it replaced the earlier Thomson model, which depicted atoms as a "plum pudding" with electrons distributed throughout a positively charged sphere. Rutherford's experiments, most notably the famous gold foil experiment, provided evidence for the existence of the atomic nucleus and laid the foundation for our modern understanding of atomic structure. However, Rutherford's model had limitations and was eventually refined by Niels Bohr and others to account for the quantization of energy levels in electrons and the behavior of atoms in more detail.