Parts of an Atom worksheet for learning atomic structure.

Let's solve this step-by-step based on the image you've described. Since I can't view images directly, I'll interpret the typical structure of an atom diagram and answer accordingly.

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Part A: Label all the parts of the atom

In a standard atomic model:

- The center (blue/grey sphere with smaller particles) is the nucleus.
- Inside the nucleus are protons (usually shown as red or positive particles) and neutrons (often gray or neutral).
- The dashed circles around the nucleus represent electron shells (also called energy levels).
- The small dots moving in these shells are electrons.

So, labeling the parts:

1. Top arrow pointing to the center: Nucleus
2. Arrow pointing to the small blue/red spheres inside the nucleus: Proton
3. Arrow pointing to the gray spheres inside the nucleus: Neutron
4. Arrow pointing to the dashed circular paths: Electron Shells
5. Arrow pointing to the tiny dots on the shells: Electron

> ✔ So, the labels should be:
> - Nucleus
> - Proton
> - Neutron
> - Electron Shells
> - Electron

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Part B: Explain the role of each part

| Part | Role |
|---------------|------|
| Proton | Positively charged particle located in the nucleus. Determines the atomic number of the element. |
| Neutron | Neutral particle (no charge) in the nucleus. Helps stabilize the nucleus and contributes to atomic mass. |
| Electron | Negatively charged particle that orbits the nucleus in electron shells. Involved in chemical bonding and reactions. |
| Nucleus | The central core of the atom made up of protons and neutrons. Contains most of the atom’s mass. |
| Electron Shells | Energy levels where electrons orbit the nucleus. Each shell can hold a specific number of electrons. |

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Part C: What element does this atom depict?

To identify the element, count the number of protons in the nucleus (since the number of protons = atomic number).

From the diagram:
- There are 3 protons (red/blue spheres in the nucleus).

An atom with 3 protons has an atomic number of 3, which corresponds to Lithium (Li).

✔ So, the element is Lithium.

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✔ Final Answers:

#### Part A: Labels
- Top arrow → Nucleus
- Arrow to red/blue dot in nucleus → Proton
- Arrow to gray dot in nucleus → Neutron
- Arrow to dashed circle → Electron Shell
- Arrow to small dot on shell → Electron

#### Part B: Roles
| Part | Role |
|----------------|------|
| Proton | Positive charge; defines atomic number |
| Neutron | No charge; stabilizes nucleus |
| Electron | Negative charge; involved in bonding |
| Nucleus | Central core; contains protons and neutrons |
| Electron Shells| Regions where electrons move; define electron configuration |

#### Part C: Element
➡️ Lithium (Li)

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