Here's a breakdown:
* Electron Shells: These are the regions around the nucleus of an atom where electrons are likely to be found. They are arranged in concentric circles, with the first shell closest to the nucleus.
* Energy Levels: Each electron shell corresponds to a specific energy level. Electrons in the inner shells have lower energy than those in the outer shells.
It's important to note that the exact location of an electron within an atom is not fixed. Instead, we talk about the probability of finding an electron in a particular region of space. This is described by the electron cloud model, which represents the probability of finding an electron at a given point in space as a fuzzy cloud.
