Solved CHE 108 Atomic Structure Worksheet The atomic number ... - Free Printable

To solve the problem, we need to fill in the missing values in the table using the information provided and the periodic table. Let's go through each element step by step.

Key Relationships:

1. Atomic Number: The number of protons in the nucleus.
2. Mass Number: The total number of protons and neutrons in the nucleus.
3. Number of Protons: Equal to the atomic number.
4. Number of Neutrons: Mass number - Atomic number.
5. Number of Electrons: Equal to the number of protons (for a neutral atom).

Step-by-Step Solution:

#### 1. Sodium (Na)
- Atomic Number: 11
- Mass Number: 23
- Number of Protons: 11
- Number of Neutrons: 23 - 11 = 12
- Number of Electrons: 11

#### 2. Iron (Fe)
- Symbol: Fe
- Atomic Number: 26 (from the periodic table)
- Mass Number: 26 (given)
- Number of Protons: 26
- Number of Neutrons: 26 - 26 = 0
- Number of Electrons: 26

#### 3. Aluminum (Al)
- Symbol: Al
- Atomic Number: 13 (from the periodic table)
- Mass Number: 27 (common isotope)
- Number of Protons: 13
- Number of Neutrons: 27 - 13 = 14
- Number of Electrons: 13

#### 4. Carbon (C)
- Symbol: C
- Atomic Number: 6 (from the periodic table)
- Mass Number: 12 (given)
- Number of Protons: 6
- Number of Neutrons: 12 - 6 = 6
- Number of Electrons: 6

#### 5. Hydrogen (H)
- Symbol: H
- Atomic Number: 1 (from the periodic table)
- Mass Number: 1 (given)
- Number of Protons: 1
- Number of Neutrons: 1 - 1 = 0
- Number of Electrons: 1

#### 6. Phosphorus (P)
- Symbol: P
- Atomic Number: 15 (from the periodic table)
- Mass Number: 31 (common isotope)
- Number of Protons: 15
- Number of Neutrons: 31 - 15 = 16
- Number of Electrons: 15

#### 7. Arsenic (As)
- Symbol: As
- Atomic Number: 33 (from the periodic table)
- Mass Number: 75 (common isotope)
- Number of Protons: 33
- Number of Neutrons: 75 - 33 = 42
- Number of Electrons: 33

#### 8. Neon (Ne)
- Symbol: Ne
- Atomic Number: 10 (from the periodic table)
- Mass Number: 20 (common isotope)
- Number of Protons: 10
- Number of Neutrons: 20 - 10 = 10
- Number of Electrons: 10

#### 9. Potassium (K)
- Symbol: K
- Atomic Number: 19 (from the periodic table)
- Mass Number: 39 (common isotope)
- Number of Protons: 19
- Number of Neutrons: 39 - 19 = 20
- Number of Electrons: 19

#### 10. Cobalt (Co)
- Symbol: Co
- Atomic Number: 27 (from the periodic table)
- Mass Number: 59 (common isotope)
- Number of Protons: 27
- Number of Neutrons: 59 - 27 = 32
- Number of Electrons: 27

#### 11. Iodine (I)
- Symbol: I
- Atomic Number: 53 (from the periodic table)
- Mass Number: 127 (common isotope)
- Number of Protons: 53
- Number of Neutrons: 74 (given)
- Number of Electrons: 53

#### 12. Lead (Pb)
- Symbol: Pb
- Atomic Number: 82 (from the periodic table)
- Mass Number: 207 (given)
- Number of Protons: 82
- Number of Neutrons: 207 - 82 = 125
- Number of Electrons: 82

#### 13. Oxygen (O)
- Symbol: O
- Atomic Number: 8 (from the periodic table)
- Mass Number: 16 (common isotope)
- Number of Protons: 8
- Number of Neutrons: 16 - 8 = 8
- Number of Electrons: 8

#### 14. Zinc (Zn)
- Symbol: Zn
- Atomic Number: 30 (given)
- Mass Number: 65 (common isotope)
- Number of Protons: 30
- Number of Neutrons: 65 - 30 = 35
- Number of Electrons: 30

#### 15. Chromium (Cr)
- Symbol: Cr
- Atomic Number: 24 (from the periodic table)
- Mass Number: 52 (common isotope)
- Number of Protons: 24
- Number of Neutrons: 52 - 24 = 28
- Number of Electrons: 24

#### 16. Barium (Ba)
- Symbol: Ba
- Atomic Number: 56 (from the periodic table)
- Mass Number: 137 (given)
- Number of Protons: 56
- Number of Neutrons: 137 - 56 = 81
- Number of Electrons: 56

#### 17. Silver (Ag)
- Symbol: Ag
- Atomic Number: 47 (from the periodic table)
- Mass Number: 108 (common isotope)
- Number of Protons: 47
- Number of Neutrons: 61 (given)
- Number of Electrons: 47

#### 18. Gold (Au)
- Symbol: Au
- Atomic Number: 79 (from the periodic table)
- Mass Number: 197 (common isotope)
- Number of Protons: 79
- Number of Neutrons: 79 (given)
- Number of Electrons: 79

Final Answer:

\[
\boxed{
\begin{array}{|c|c|c|c|c|c|}
\hline
\text{Name of Element} & \text{Symbol of Element} & \text{Atomic Number} & \text{Mass Number} & \text{Number of Protons} & \text{Number of Neutrons} & \text{Number of Electrons} \\
\hline
\text{Sodium} & \text{Na} & 11 & 23 & 11 & 12 & 11 \\
\hline
\text{Iron} & \text{Fe} & 26 & 26 & 26 & 0 & 26 \\
\hline
\text{Aluminum} & \text{Al} & 13 & 27 & 13 & 14 & 13 \\
\hline
\text{Carbon} & \text{C} & 6 & 12 & 6 & 6 & 6 \\
\hline
\text{Hydrogen} & \text{H} & 1 & 1 & 1 & 0 & 1 \\
\hline
\text{Phosphorus} & \text{P} & 15 & 31 & 15 & 16 & 15 \\
\hline
\text{Arsenic} & \text{As} & 33 & 75 & 33 & 42 & 33 \\
\hline
\text{Neon} & \text{Ne} & 10 & 20 & 10 & 10 & 10 \\
\hline
\text{Potassium} & \text{K} & 19 & 39 & 19 & 20 & 19 \\
\hline
\text{Cobalt} & \text{Co} & 27 & 59 & 27 & 32 & 27 \\
\hline
\text{Iodine} & \text{I} & 53 & 127 & 53 & 74 & 53 \\
\hline
\text{Lead} & \text{Pb} & 82 & 207 & 82 & 125 & 82 \\
\hline
\text{Oxygen} & \text{O} & 8 & 16 & 8 & 8 & 8 \\
\hline
\text{Zinc} & \text{Zn} & 30 & 65 & 30 & 35 & 30 \\
\hline
\text{Chromium} & \text{Cr} & 24 & 52 & 24 & 28 & 24 \\
\hline
\text{Barium} & \text{Ba} & 56 & 137 & 56 & 81 & 56 \\
\hline
\text{Silver} & \text{Ag} & 47 & 108 & 47 & 61 & 47 \\
\hline
\text{Gold} & \text{Au} & 79 & 197 & 79 & 79 & 79 \\
\hline
\end{array}
}
\]