Let's determine the correct values for the table based on the relationships within an atom. Here's the completed table along with the step-by-step explanation:
### Table:
\begin{tabular}{|c|c|c|c|c|}
\hline
Number of Protons & Number of Neutrons & Atomic Number & Mass Number & Element (symbol) \\
\hline
20 & 20 & 20 & 40 & Ca \\
\hline
9 & 10 & 9 & 19 & F \\
\hline
\end{tabular}
### Explanation:
1. First Row:
- Number of Protons: 20
- Number of Neutrons: 20
- Atomic Number (A): The atomic number is equal to the number of protons, so [tex]\( A = 20 \)[/tex].
- Mass Number (B): The mass number is the sum of the protons and neutrons. Therefore, [tex]\( B = 20 + 20 = 40 \)[/tex].
- Element Symbol (C): Given 20 protons, the element with atomic number 20 is Calcium (Ca). Hence, [tex]\( C = \text{Ca} \)[/tex].
2. Second Row:
- Number of Protons: 9
- Atomic Number (E): The atomic number is equal to the number of protons, so [tex]\( E = 9 \)[/tex].
- Mass Number: Given as 19.
- Number of Neutrons (D): The number of neutrons can be found by subtracting the number of protons from the mass number. Therefore, [tex]\( D = 19 - 9 = 10 \)[/tex].
- Element Symbol (F): Given 9 protons, the element with atomic number 9 is Fluorine (F). Hence, [tex]\( F = \text{F} \)[/tex].
Thus, filling the calculated values back into the table gives:
\begin{tabular}{|c|c|c|c|c|}
\hline
Number of Protons & Number of Neutrons & Atomic Number & Mass Number & Element (symbol) \\
\hline
20 & 20 & 20 & 40 & Ca \\
\hline
9 & 10 & 9 & 19 & F \\
\hline
\end{tabular}
