Let's complete the table step-by-step:
### For the first row:
1. Finding the Number of Protons (A):
- Given: Atomic Number is the number of protons.
- Atomic Number = 7
- Therefore, the number of protons (A) = 7
2. Finding the Number of Neutrons (B):
- Given: Mass Number = 15
- Number of Neutrons (B) = Mass Number - Number of Protons = 15 - 7
- Therefore, the number of neutrons (B) = 8
3. Finding the Atomic Number:
- Already known from the given data.
- Atomic Number = 7
4. Identifying the Element (C) using the Atomic Number:
- Given: Atomic Number = 7
- Looking up Atomic Number 7 in the periodic table, the element is Nitrogen (symbol N).
- Therefore, the element (C) is N.
### For the second row:
1. Finding the Number of Protons (D):
- Given: Atomic Number is the number of protons.
- Atomic Number = 26
- Therefore, the number of protons (D) = 26
2. Finding the Number of Neutrons (E):
- Given: Mass Number = 56
- Number of Neutrons (E) = Mass Number - Atomic Number = 56 - 26
- Therefore, the number of neutrons (E) = 30
3. Finding the Atomic Number:
- Already known from the given data.
- Atomic Number = 26
4. Identifying the Element (F) using the Atomic Number:
- Given: Atomic Number = 26
- Looking up Atomic Number 26 in the periodic table, the element is Iron (symbol Fe).
- Therefore, the element (F) is Fe.
### Completed Table:
[tex]\[
\begin{tabular}{|c|c|c|c|c|}
\hline
\begin{tabular}{c}
Number of \\
Protons
\end{tabular} & \begin{tabular}{c}
Number of \\
Neutrons
\end{tabular} & \begin{tabular}{c}
Atomic \\
Number
\end{tabular} & \begin{tabular}{c}
Mass \\
Number
\end{tabular} & \begin{tabular}{c}
Element \\
(symbol)
\end{tabular} \\
\hline
7 & 8 & 7 & 15 & N \\
\hline
26 & 30 & 26 & 56 & Fe \\
\hline
\end{tabular}
\][/tex]
