Answer: 1. Dalton’s Model – Atoms are solid, indivisible spheres.2.Thomson’s Model – Known as the “Plum Pudding Model”; atoms have negative electrons inside a positively charged sphere.3.Rutherford’s Model – Atoms have a dense, positively charged nucleus with electrons orbiting around it.4.Bohr’s Model – Electrons move in fixed orbits or energy levels around the nucleus.5.Quantum Mechanical Model – The most modern model; electrons move in regions called orbitals, not fixed paths.