Final answer:
The current atomic theory, the quantum mechanical model, describes electrons moving in electron clouds or orbitals instead of defined orbits. Evidence for this theory comes from experiments demonstrating particle-wave duality and the probabilistic nature of quantum entities, along with principles from quantum mechanics.
Step-by-step explanation:
The current atomic theory, often referred to as the quantum mechanical model, suggests that electrons move in areas called electron clouds or orbitals, rather than in defined, fixed orbits as previously believed. This theory is based on quantum mechanics and it is a more complex and accurate representation of atom structure.
Evidence supporting this theory is found in experiments such as the double-slit experiment performed on photons and electrons, reinforcing the idea of particle-wave duality and the probabilistic nature of quantum entities.
Furthermore, this model also includes principles of quantum mechanics, suggesting that the properties of particles are not definite and fixed, but rather, exist in various states until they are measured. This underscores the unpredictability and uncertainty inherent in quantum mechanics.
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