Bohr Model Worksheet: Draw inner electrons in blue and valence electrons in red for each element.

Since I can't view or access images directly, I’ll help you solve the Bohr Model Worksheet based on the description and typical structure of such worksheets.

The task is to draw the Bohr model for each element, showing:

- Inner electrons in blue
- Valence (outer) electrons in red
- The circles represent electron shells (energy levels)

We’ll go through each element, determine its atomic number (number of protons and electrons), then distribute the electrons into shells using the 2n² rule (maximum electrons per shell: 2, 8, 18, etc.), and identify valence electrons.

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🔷 Rules:

- Electron shell capacity:
- 1st shell (n=1): max 2 electrons
- 2nd shell (n=2): max 8 electrons
- 3rd shell (n=3): max 8 (for these elements)
- 4th shell (n=4): max 18 (but only needed for heavier elements)

- Valence electrons = electrons in the outermost shell

- Inner electrons = all electrons not in the outermost shell

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Now let’s go through each element:

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1. Sodium (Na) – Atomic Number: 11

- Electrons: 11
- Distribution:
- Shell 1: 2 electrons (blue)
- Shell 2: 8 electrons (blue)
- Shell 3: 1 electron (red – valence)
- Draw:
- 1st circle: 2 blue dots
- 2nd circle: 8 blue dots
- 3rd circle: 1 red dot

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2. Aluminum (Al) – Atomic Number: 13

- Electrons: 13
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 8 (blue)
- Shell 3: 3 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 8 blue
- 3rd: 3 red dots

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3. Carbon (C) – Atomic Number: 6

- Electrons: 6
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 4 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 4 red dots

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4. Silicon (Si) – Atomic Number: 14

- Electrons: 14
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 8 (blue)
- Shell 3: 4 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 8 blue
- 3rd: 4 red dots

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5. Oxygen (O) – Atomic Number: 8

- Electrons: 8
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 6 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 6 red dots

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6. Chlorine (Cl) – Atomic Number: 17

- Electrons: 17
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 8 (blue)
- Shell 3: 7 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 8 blue
- 3rd: 7 red dots

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7. Fluorine (F) – Atomic Number: 9

- Electrons: 9
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 7 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 7 red dots

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8. Phosphorus (P) – Atomic Number: 15

- Electrons: 15
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 8 (blue)
- Shell 3: 5 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 8 blue
- 3rd: 5 red dots

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9. Lithium (Li) – Atomic Number: 3

- Electrons: 3
- Distribution:
- Shell 1: 2 (blue)
- Shell 2: 1 (red – valence)
- Draw:
- 1st: 2 blue
- 2nd: 1 red dot

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✔ Summary Table:

| Element | Atomic # | Electron Shells (Blue/Red) | Valence e⁻ |
|-------------|----------|--------------------------------------------------|------------|
| Sodium (Na) | 11 | 2 (blue), 8 (blue), 1 (red) | 1 |
| Aluminum (Al)| 13 | 2 (blue), 8 (blue), 3 (red) | 3 |
| Carbon (C) | 6 | 2 (blue), 4 (red) | 4 |
| Silicon (Si)| 14 | 2 (blue), 8 (blue), 4 (red) | 4 |
| Oxygen (O) | 8 | 2 (blue), 6 (red) | 6 |
| Chlorine (Cl)| 17 | 2 (blue), 8 (blue), 7 (red) | 7 |
| Fluorine (F)| 9 | 2 (blue), 7 (red) | 7 |
| Phosphorus (P)| 15 | 2 (blue), 8 (blue), 5 (red) | 5 |
| Lithium (Li)| 3 | 2 (blue), 1 (red) | 1 |

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🖼️ How to Draw Each Bohr Model:

1. Start with a central nucleus (dot).
2. Draw concentric circles around it.
3. Place electrons as dots on the circles:
- Inner shells (full ones): blue
- Outermost shell: red
4. Make sure the total matches atomic number.

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💡 Tips:

- Always fill inner shells completely before adding to outer ones.
- The valence electrons are crucial for bonding — that’s why they’re colored red.
- For transition metals, this model gets more complex, but these are main group elements.

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If you're filling out the worksheet:
- Use blue pen/pencil for inner electrons.
- Use red pen/pencil for valence electrons.
- Write the total number of electrons in the blank under each atom (e.g., Na: 11).

Let me know if you want a visual sketch guide or printable version!