About the Atom Structure 3D model (Chemistry)
Explore protons, neutrons and electrons orbiting a nucleus.
An atom is the smallest unit of an element. The nucleus holds protons and neutrons, while electrons move around it in shells.
What students learn from this chemistry model
- Name the three particles that make up an atom
- Explain why the nucleus holds almost all the mass
- Describe how electrons are arranged in shells
Labelled parts explained
- What is the Nucleus in Atom Structure?
- The dense centre of the atom that contains protons and neutrons.
- What is the Proton in Atom Structure?
- A positively charged particle inside the nucleus. Its count decides the element.
- What is the Neutron in Atom Structure?
- A neutral particle inside the nucleus that adds mass and keeps it stable.
- What is the Electron in Atom Structure?
- A negatively charged particle that moves around the nucleus in shells.
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