To complete the table to describe each atom, let's analyze the given information and fill in the blanks accordingly:
### Row 1 Analysis:
1. Number of Protons = 20
2. Number of Neutrons = 20
From this information:
- Atomic Number (A): The atomic number is the number of protons in the nucleus of an atom. Therefore, [tex]\( A = 20 \)[/tex].
- Mass Number (B): The mass number is the sum of the number of protons and neutrons. Therefore, [tex]\( B = 20 + 20 = 40 \)[/tex].
- Element Symbol (C): The element with atomic number 20 is Calcium. Therefore, [tex]\( C = \text{Ca} \)[/tex].
### Row 2 Analysis:
1. Number of Protons = 9
2. Number of Neutrons (D): To find the number of neutrons, subtract the number of protons from the mass number. The mass number is given as 19. Therefore, [tex]\( D = 19 - 9 = 10 \)[/tex].
3. Atomic Number (E): The atomic number is the number of protons. Therefore, [tex]\( E = 9 \)[/tex].
4. Element Symbol (F): The element with atomic number 9 is Fluorine. Therefore, [tex]\( F = \text{F} \)[/tex].
Now, let's fill in the blanks in the table:
[tex]\[
\begin{tabular}{|c|c|c|c|c|}
\hline \begin{tabular}{c}
Number of \\
Protons
\end{tabular} & \begin{tabular}{c}
Number of \\
Neutrons
\end{tabular} & \begin{tabular}{c}
Atomic \\
Number
\end{tabular} & \begin{tabular}{c}
Mass \\
Number
\end{tabular} & \begin{tabular}{c}
Element \\
(symbol)
\end{tabular} \\
\hline 20 & 20 & 20 & 40 & Ca \\
\hline 9 & 10 & 9 & 19 & F \\
\hline
\end{tabular}
\][/tex]
In summary:
- [tex]\( A = 20 \)[/tex]
- [tex]\( B = 40 \)[/tex]
- [tex]\( C = \text{Ca} \)[/tex]
- [tex]\( D = 10 \)[/tex]
