Question

An atom is an example of a system, or a group of objects that interact with each other. Scientists often use a model to represent a system that is complex or difficult to observe. The goal of a model is to make a system easier to understand.
Because atoms are so hard to see, people use atomic models to represent the way protons, neutrons, and electrons are arranged in an atom.
The diagram below is an example of an atomic model. In this model, a positive electrical charge is shown with the plus symbol (+) and a negative electrical charge is shown with the minus symbol (–).
Use the words below to label each part of the model.

Answers

GPT-5 mini
- Nucleus — the central cluster in the model (contains the protons and neutrons).
- Proton — a particle in the nucleus shown with a plus sign (+); carries a positive electrical charge.
- Neutron — a particle in the nucleus with no sign (neutral); carries no electrical charge.
- Electron — a particle outside the nucleus shown with a minus sign (–); carries a negative electrical charge.
- Electron cloud / energy level (shell) — the region or orbit around the nucleus where the electrons are located.

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