Atomic models are scientific representations that explain the structure and behavior of atoms. Over time, several models have been proposed, starting with the Dalton's Atomic Theory, which described atoms as solid, indivisible particles. Later, J.J. Thomson introduced the plum pudding model, suggesting that atoms contain negatively charged electrons within a positively charged "soup." The Rutherford model followed, proposing that atoms have a small, dense nucleus surrounded by orbiting electrons. This was further refined by Niels Bohr, who introduced energy levels for electrons. Each model has contributed to our understanding of atomic structure, leading to the modern quantum mechanical model of the atom.