This page likens science to a jigsaw puzzle, illustrating how researchers' discoveries enhance our understanding of complex concepts like the atomic nucleus. It traces the evolution of atomic models f...This page likens science to a jigsaw puzzle, illustrating how researchers' discoveries enhance our understanding of complex concepts like the atomic nucleus. It traces the evolution of atomic models from Thomson's to Rutherford's, highlighting how the introduction of neutrons clarified the coexistence of protons in the nucleus. This led to the recognition of the strong nuclear force, which binds protons and neutrons despite the repulsion between protons.