Bohr Atomic Models worksheet for students to draw atomic structures using the periodic table.

Since I can't view or access images directly, I’ll help you solve the Bohr Atomic Models worksheet based on the instructions and common knowledge of atomic structure. Below is a complete solution for each element listed, including:

- Symbol
- Atomic Number
- Mass Number (most common isotope)
- Bohr model description (how to draw it)

---

🔬 How to Draw a Bohr Model:

1. Nucleus: Write protons (P-) and neutrons (N-) in the center.
2. Electron Shells: Draw circles around the nucleus (each shell holds a max number of electrons):
- 1st shell → 2 electrons
- 2nd shell → 8 electrons
- 3rd shell → 8 electrons (for these elements)
- 4th shell → up to 18, but we’ll only go up to 3rd for now
3. Place electrons as dots in shells, pairing them after the first orbital.

---

✔ Completed Table

| Element | Symbol | Atomic # | Mass # | Protons (P-) | Neutrons (N-) | Electrons | Bohr Model Description |
|-------------|--------|----------|--------|--------------|----------------|-----------|------------------------|
| Hydrogen | H | 1 | 1 | P-1 | N-0 | 1 | 1 electron in 1st shell |
| Helium | He | 2 | 4 | P-2 | N-2 | 2 | 2 electrons in 1st shell (paired) |
| Lithium | Li | 3 | 7 | P-3 | N-4 | 3 | 2 in 1st, 1 in 2nd |
| Beryllium | Be | 4 | 9 | P-4 | N-5 | 4 | 2 in 1st, 2 in 2nd |
| Boron | B | 5 | 11 | P-5 | N-6 | 5 | 2 in 1st, 3 in 2nd |
| Carbon | C | 6 | 12 | P-6 | N-6 | 6 | 2 in 1st, 4 in 2nd |
| Nitrogen | N | 7 | 14 | P-7 | N-7 | 7 | 2 in 1st, 5 in 2nd |
| Oxygen | O | 8 | 16 | P-8 | N-8 | 8 | 2 in 1st, 6 in 2nd |
| Fluorine | F | 9 | 19 | P-9 | N-10 | 9 | 2 in 1st, 7 in 2nd |
| Neon | Ne | 10 | 20 | P-10 | N-10 | 10 | 2 in 1st, 8 in 2nd |
| Sodium | Na | 11 | 23 | P-11 | N-12 | 11 | 2 in 1st, 8 in 2nd, 1 in 3rd |
| Magnesium | Mg | 12 | 24 | P-12 | N-12 | 12 | 2 in 1st, 8 in 2nd, 2 in 3rd |
| Aluminum | Al | 13 | 27 | P-13 | N-14 | 13 | 2 in 1st, 8 in 2nd, 3 in 3rd |
| Silicon | Si | 14 | 28 | P-14 | N-14 | 14 | 2 in 1st, 8 in 2nd, 4 in 3rd |
| Phosphorus | P | 15 | 31 | P-15 | N-16 | 15 | 2 in 1st, 8 in 2nd, 5 in 3rd |
| Sulfur | S | 16 | 32 | P-16 | N-16 | 16 | 2 in 1st, 8 in 2nd, 6 in 3rd |
| Chlorine | Cl | 17 | 35 | P-17 | N-18 | 17 | 2 in 1st, 8 in 2nd, 7 in 3rd |
| Argon | Ar | 18 | 40 | P-18 | N-22 | 18 | 2 in 1st, 8 in 2nd, 8 in 3rd |

---

🎯 Example: Carbon (C)

- Symbol: C
- Atomic Number: 6
- Mass Number: 12
- Protons: P-6
- Neutrons: N-6
- Electrons: 6
- Bohr Model:
- Center: P-6, N-6
- 1st shell (inner circle): 2 electrons (dots, paired)
- 2nd shell (outer circle): 4 electrons (dots, unpaired)

> 💡 Tip: Use dots and pair them in each shell after the first one for clarity.

---

🔍 How to Fill the Worksheet:

For each box:
1. Write the symbol, atomic number, and mass number at the top.
2. In the nucleus: write `P-#` and `N-#`.
3. Draw concentric circles for shells.
4. Place dots around each shell according to electron configuration.

---

🧠 Tips:

- The atomic number = number of protons = number of electrons (in neutral atoms).
- Mass number ≈ protons + neutrons (use most common isotope).
- Electron configuration follows the order: 2, 8, 8, ...

---

✔ Example: Neon (Ne)

- Symbol: Ne
- Atomic #: 10
- Mass #: 20
- Protons: P-10
- Neutrons: N-10
- Electrons: 10
- Bohr Model:
- Inner shell: 2 electrons
- Outer shell: 8 electrons (all paired)

---

Let me know if you'd like a printable version or an image-based drawing guide!