To complete the table describing each atom using the given information and the periodic table, we need to fill in values for [tex]\( A \)[/tex], [tex]\( B \)[/tex], [tex]\( C \)[/tex], [tex]\( D \)[/tex], and [tex]\( F \)[/tex].
### First Row Computation:
- The number of protons is given as 20.
- The number of neutrons is given as 20.
A: Atomic Number
- The atomic number ([tex]\( A \)[/tex]) is the number of protons, which equals 20.
B: Mass Number
- The mass number ([tex]\( B \)[/tex]) is the sum of protons and neutrons.
[tex]\[ B = 20 \text{ protons} + 20 \text{ neutrons} = 40 \][/tex]
C: Element Symbol
- Looking up the element with atomic number 20 in the periodic table, it corresponds to Calcium (Ca).
[tex]\[
\begin{aligned}
A &= 20 \\
B &= 40 \\
C &= \text{Ca}
\end{aligned}
\][/tex]
### Second Row Computation:
- The number of protons is given as 9.
- The mass number is given as 19.
- The atomic number is the same as the number of protons, which is 9.
D: Number of Neutrons
- The number of neutrons ([tex]\( D \)[/tex]) is the mass number minus the number of protons.
[tex]\[ D = 19 \text{ (mass number)} - 9 \text{ (protons)} = 10 \][/tex]
E: Atomic Number
- The atomic number ([tex]\( E \)[/tex]) is the number of protons, which equals 9.
F: Element Symbol
- Looking up the element with atomic number 9 in the periodic table, it corresponds to Fluorine (F).
[tex]\[
\begin{aligned}
D &= 10 \\
E &= 9 \\
F &= \text{F}
\end{aligned}
\][/tex]
Now, completing 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]
Final Answers:
- [tex]\( A = 20 \)[/tex]
- [tex]\( B = 40 \)[/tex]
- [tex]\( C = \text{Ca} \)[/tex]
- [tex]\( D = 10 \)[/tex]
- [tex]\( E = 9 \)[/tex]
- [tex]\( F = \text{F} \)[/tex]
