Electron Arrangement Worksheet | Atomic Model Activity - Free Printable

To solve the problem, we need to fill in the correct number of electrons for each element on the Bohr model and identify the number of protons, neutrons, electrons, atomic number, and atomic mass for each element. Let's go through each element step by step.

Hydrogen (H)

- Atomic Number: 1
- Atomic Mass: Approximately 1 (for simplicity, we'll use 1)
- Protons: 1
- Neutrons: 0 (since \( \text{Atomic Mass} - \text{Protons} = \text{Neutrons} \))
- Electrons: 1 (equal to the number of protons in a neutral atom)

Bohr Model:
- One electron in the first shell.

Carbon (C)

- Atomic Number: 6
- Atomic Mass: Approximately 12
- Protons: 6
- Neutrons: 6 (since \( 12 - 6 = 6 \))
- Electrons: 6

Bohr Model:
- Two electrons in the first shell.
- Four electrons in the second shell.

Oxygen (O)

- Atomic Number: 8
- Atomic Mass: Approximately 16
- Protons: 8
- Neutrons: 8 (since \( 16 - 8 = 8 \))
- Electrons: 8

Bohr Model:
- Two electrons in the first shell.
- Six electrons in the second shell.

Sulfur (S)

- Atomic Number: 16
- Atomic Mass: Approximately 32
- Protons: 16
- Neutrons: 16 (since \( 32 - 16 = 16 \))
- Electrons: 16

Bohr Model:
- Two electrons in the first shell.
- Eight electrons in the second shell.
- Six electrons in the third shell.

Nitrogen (N)

- Atomic Number: 7
- Atomic Mass: Approximately 14
- Protons: 7
- Neutrons: 7 (since \( 14 - 7 = 7 \))
- Electrons: 7

Bohr Model:
- Two electrons in the first shell.
- Five electrons in the second shell.

Boron (B)

- Atomic Number: 5
- Atomic Mass: Approximately 11
- Protons: 5
- Neutrons: 6 (since \( 11 - 5 = 6 \))
- Electrons: 5

Bohr Model:
- Two electrons in the first shell.
- Three electrons in the second shell.

Helium (He)

- Atomic Number: 2
- Atomic Mass: Approximately 4
- Protons: 2
- Neutrons: 2 (since \( 4 - 2 = 2 \))
- Electrons: 2

Bohr Model:
- Two electrons in the first shell.

Final Answers

#### Hydrogen (H)
- Protons: 1
- Neutrons: 0
- Electrons: 1
- Atomic Number: 1
- Atomic Mass: 1

#### Carbon (C)
- Protons: 6
- Neutrons: 6
- Electrons: 6
- Atomic Number: 6
- Atomic Mass: 12

#### Oxygen (O)
- Protons: 8
- Neutrons: 8
- Electrons: 8
- Atomic Number: 8
- Atomic Mass: 16

#### Sulfur (S)
- Protons: 16
- Neutrons: 16
- Electrons: 16
- Atomic Number: 16
- Atomic Mass: 32

#### Nitrogen (N)
- Protons: 7
- Neutrons: 7
- Electrons: 7
- Atomic Number: 7
- Atomic Mass: 14

#### Boron (B)
- Protons: 5
- Neutrons: 6
- Electrons: 5
- Atomic Number: 5
- Atomic Mass: 11

#### Helium (He)
- Protons: 2
- Neutrons: 2
- Electrons: 2
- Atomic Number: 2
- Atomic Mass: 4

Summary of Answers

| Element | Protons | Neutrons | Electrons | Atomic Number | Atomic Mass |
|---------|---------|----------|-----------|---------------|-------------|
| Hydrogen | 1 | 0 | 1 | 1 | 1 |
| Carbon | 6 | 6 | 6 | 6 | 12 |
| Oxygen | 8 | 8 | 8 | 8 | 16 |
| Sulfur | 16 | 16 | 16 | 16 | 32 |
| Nitrogen | 7 | 7 | 7 | 7 | 14 |
| Boron | 5 | 6 | 5 | 5 | 11 |
| Helium | 2 | 2 | 2 | 2 | 4 |

Final Answer

\boxed{
\begin{array}{|c|c|c|c|c|c|}
\hline
\text{Element} & \text{Protons} & \text{Neutrons} & \text{Electrons} & \text{Atomic Number} & \text{Atomic Mass} \\
\hline
\text{Hydrogen} & 1 & 0 & 1 & 1 & 1 \\
\hline
\text{Carbon} & 6 & 6 & 6 & 6 & 12 \\
\hline
\text{Oxygen} & 8 & 8 & 8 & 8 & 16 \\
\hline
\text{Sulfur} & 16 & 16 & 16 & 16 & 32 \\
\hline
\text{Nitrogen} & 7 & 7 & 7 & 7 & 14 \\
\hline
\text{Boron} & 5 & 6 & 5 & 5 & 11 \\
\hline
\text{Helium} & 2 & 2 & 2 & 2 & 4 \\
\hline
\end{array}
}