Middle School Periodic Table Worksheets - Free Printable

The task involves using the Periodic Table to fill in missing information about various elements. Below is a detailed explanation and solution for each part of the problem.

---

Key Reminders:

1. Atomic Number: The number of protons in an atom.
2. Element Symbol: A one- or two-letter abbreviation for the element.
3. Element Name: The full name of the element.
4. Atomic Mass: The average mass of an atom, usually given in atomic mass units (amu). It is approximately equal to the sum of protons and neutrons.
5. Number of Protons: Equal to the atomic number.
6. Number of Electrons: Equal to the number of protons in a neutral atom.
7. Number of Neutrons: Calculated as \( \text{Atomic Mass} - \text{Atomic Number} \) (rounded to the nearest whole number).

---

Solutions:

#### 1. Hydrogen (H)
- a. Atomic Number: 1
- b. Atomic Mass: 1

#### 2. Magnesium (Mg)
- a. Element Name: Magnesium
- b. Atomic Number: 12

#### 3. Iron (Fe)
- a. # Protons: 26
- b. Element Symbol: Fe

#### 4. Boron (B)
- a. Atomic Number: 5
- b. Element Name: Boron

#### 5. Gold (Au)
- a. # Electrons: 79 (equal to the atomic number)
- b. # Protons: 79 (equal to the atomic number)
- c. Atomic Number: 79
- d. Name of Element: Gold

#### 6. Nickel (Ni)
- a. Atomic Mass: 59
- b. Element Symbol: Ni

#### 7. Sodium (Na)
- a. Element Symbol: Na
- b. # Neutrons: \( 23 - 11 = 12 \)
- c. Element Name: Sodium

#### 8. Platinum (Pt)
- a. Atomic Number: 78
- b. # Neutrons: \( 195 - 78 = 117 \)

#### 9. Lead (Pb)
- a. Element Name: Lead
- b. # Protons: 82 (equal to the atomic number)

#### 10. Zirconium (Zr)
- a. # Electrons: 40 (equal to the atomic number)
- b. Atomic Mass: 91

#### 11. Radon (Rn)
- a. Atomic Number: 86
- b. # Neutrons: \( 226 - 86 = 140 \)

#### 12. Copper (Cu)
- a. Atomic Mass: 64
- b. # Neutrons: \( 64 - 29 = 35 \)

---

Final Answers:

1. Hydrogen (H)
- a. Atomic Number: 1
- b. Atomic Mass: 1

2. Magnesium (Mg)
- a. Element Name: Magnesium
- b. Atomic Number: 12

3. Iron (Fe)
- a. # Protons: 26
- b. Element Symbol: Fe

4. Boron (B)
- a. Atomic Number: 5
- b. Element Name: Boron

5. Gold (Au)
- a. # Electrons: 79
- b. # Protons: 79
- c. Atomic Number: 79
- d. Name of Element: Gold

6. Nickel (Ni)
- a. Atomic Mass: 59
- b. Element Symbol: Ni

7. Sodium (Na)
- a. Element Symbol: Na
- b. # Neutrons: 12
- c. Element Name: Sodium

8. Platinum (Pt)
- a. Atomic Number: 78
- b. # Neutrons: 117

9. Lead (Pb)
- a. Element Name: Lead
- b. # Protons: 82

10. Zirconium (Zr)
- a. # Electrons: 40
- b. Atomic Mass: 91

11. Radon (Rn)
- a. Atomic Number: 86
- b. # Neutrons: 140

12. Copper (Cu)
- a. Atomic Mass: 64
- b. # Neutrons: 35

---

Boxed Final Answer:

\[
\boxed{
\begin{array}{ll}
1. & \text{a. 1, b. 1} \\
2. & \text{a. Magnesium, b. 12} \\
3. & \text{a. 26, b. Fe} \\
4. & \text{a. 5, b. Boron} \\
5. & \text{a. 79, b. 79, c. 79, d. Gold} \\
6. & \text{a. 59, b. Ni} \\
7. & \text{a. Na, b. 12, c. Sodium} \\
8. & \text{a. 78, b. 117} \\
9. & \text{a. Lead, b. 82} \\
10. & \text{a. 40, b. 91} \\
11. & \text{a. 86, b. 140} \\
12. & \text{a. 64, b. 35} \\
\end{array}
}
\]