11 Worksheets for Exploring the Fundamentals of Atomic Structure ... - Free Printable

Let's solve the problem step by step based on the image you've provided.

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Part 1: Fill in the Table

Atoms are composed of 3 subatomic particles.

We need to fill in the following table:

| Subatomic Particle | Charge | Location |
|--------------------|--------------|------------------|
| Proton | +1 | Nucleus |
| Neutron | 0 (neutral) | Nucleus |
| Electron | -1 | Electron shells (outside the nucleus) |

> ✔ Explanation:
- Protons have a positive charge (+1) and are located in the nucleus.
- Neutrons have no charge (neutral, 0) and are also in the nucleus.
- Electrons have a negative charge (-1) and orbit the nucleus in electron shells (energy levels).

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Part 2: Draw in the Charges of Each Subatomic Particle in the Diagrams

There are two diagrams:

#### Diagram 1 (Top):
- The nucleus contains red circles (protons) and black circles (neutrons).
- Blue dots (electrons) are in the electron shells around the nucleus.

Instructions: Label or write the charges next to each particle type.

- Red circles (Protons) → label with +
- Black circles (Neutrons) → label with 0 or neutral
- Blue dots (Electrons) → label with –

> You can write:
> - Proton: +
> - Neutron: 0
> - Electron: –

Place these labels near the respective particles in the diagram.

#### Diagram 2 (Bottom):
- This is a Bohr model-style atom.
- Green spheres in the center = nucleus (likely protons and neutrons)
- Black dots on orbits = electrons

Labeling:
- Nucleus (green) → contains protons (+) and neutrons (0), so it has a net positive charge.
- Electrons (black dots) → each labeled with –

> Again, label:
> - Electrons: –
> - Nucleus: + (overall)

You can draw small + signs inside the nucleus and – signs near the electrons.

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Part 3: What is the Electron Cloud?

Answer:
The electron cloud is the region around the nucleus where electrons are most likely to be found. It represents the probability distribution of electrons in an atom. Instead of fixed orbits, electrons move rapidly in this cloud, forming a "cloud-like" shape due to their wave-like behavior.

> 🔍 Key idea: The electron cloud is a modern model that replaces the older idea of electrons moving in fixed paths (like planets). It shows where electrons are likely to be found based on quantum mechanics.

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✔ Final Summary:

#### Completed Table:

| Subatomic Particle | Charge | Location |
|--------------------|--------------|------------------------|
| Proton | +1 | Nucleus |
| Neutron | 0 | Nucleus |
| Electron | -1 | Electron shells |

#### Diagrams:
- Add + to protons (red)
- Add 0 to neutrons (black)
- Add – to electrons (blue or black dots)

#### Electron Cloud Answer:
> The electron cloud is the area around the nucleus where electrons are likely to be found, representing their probable location based on quantum theory.

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