Final answer:
Scientists use models to study atoms because atoms cannot be directly observed. The atomic model has changed over time as new evidence and theories emerged. The current atomic model, called the "Electron Cloud Model," describes electrons as existing in electron clouds around the nucleus.
Step-by-step explanation:
Scientists use models to study atoms because atoms are very small and cannot be directly observed. Models provide a simplified representation of atoms that helps scientists understand their structure and behavior. For example, the electron shell model shows how electrons are arranged in energy levels around an atomic nucleus.
The atomic model has changed over time as new experimental evidence and scientific theories have emerged. Early models, such as the Dalton model, proposed that atoms were solid, indivisible spheres. However, as more experiments were conducted, scientists discovered the existence of subatomic particles like protons, neutrons, and electrons, leading to the development of more sophisticated atomic models.
The current atomic model is called the "Electron Cloud Model" because it describes electrons as existing in regions of space called electron clouds. These clouds represent the probability of finding electrons in different areas around the nucleus. The electron cloud model is based on the principles of quantum mechanics and provides a more accurate and detailed understanding of atomic structure.
Learn more about Why scientists use models to study atoms and how the atomic model has changed over time