Let's complete the table by filling in the missing values for the given atoms.
### 1st Row:
- Number of Neutrons = 7
- Mass Number = 15
- Atomic Number = Number of Protons
Step-by-step:
1. Mass Number (15) = Number of Protons (A) + Number of Neutrons (7)
[tex]\[ A = 15 - 7 \][/tex]
[tex]\[ A = 8 \][/tex]
So, Number of Protons (A) = 8.
2. Atomic Number (B) is the Number of Protons
Therefore, [tex]\( B = 8 \)[/tex].
3. The element with Atomic Number 8 is Oxygen (O)
Therefore, [tex]\( C = \text{O} \)[/tex].
### 2nd Row:
- Atomic Number = 26
- Mass Number = 56
- Number of Protons = Atomic Number
Step-by-step:
4. Atomic Number = Number of Protons (D)
Therefore, [tex]\( D = 26 \)[/tex].
5. Mass Number (56) = Number of Protons (26) + Number of Neutrons (E)
[tex]\[ E = 56 - 26 \][/tex]
[tex]\[ E = 30 \][/tex]
So, Number of Neutrons (E) = 30.
6. The element with Atomic Number 26 is Iron (Fe)
Therefore, [tex]\( F = \text{Fe} \)[/tex].
### Final Values:
[tex]\[ A = 8 \][/tex]
[tex]\[ B = 8 \][/tex]
[tex]\[ C = \text{O} \][/tex]
[tex]\[ D = 26 \][/tex]
[tex]\[ E = 30 \][/tex]
[tex]\[ F = \text{Fe} \][/tex]
### Completed Table:
[tex]\[
\begin{array}{|c|c|c|c|c|}
\hline
\begin{array}{c}
\text{Number of} \\
\text{Protons}
\end{array}
& \begin{array}{c}
\text{Number of} \\
\text{Neutrons}
\end{array}
& \begin{array}{c}
\text{Atomic} \\
\text{Number}
\end{array}
& \begin{array}{c}
\text{Mass} \\
\text{Number}
\end{array}
& \begin{array}{c}
\text{Element} \\
\text{(symbol)}
\end{array} \\
\hline
8 & 7 & 8 & 15 & \text{O} \\
\hline
26 & 30 & 26 & 56 & \text{Fe} \\
\hline
\end{array}
\][/tex]
### Answer:
A = 8
B = 8
C = O
D = 26
