Questions: Fill in the missing information:
symbol atom or ion? check all that apply number of protons number of electrons
-----------------------------------------------------------------------------------
neutral atom cation anion 48
neutral atom cation anion 17 18
Mn^3+ neutral atom cation anion
Transcript text: Fill in the missing information:
\begin{tabular}{|c|cc|c|c|c|}
\hline symbol & \begin{tabular}{c}
atom or ion? \\
check all that apply
\end{tabular} & \begin{tabular}{c}
number of \\
protons
\end{tabular} & \begin{tabular}{c}
number of \\
electrons
\end{tabular} \\
\hline$\square$ & $\square$ neutral atom & $\square$ cation & $\square$ anion & $\square$ & 48 \\
\hline$\square$ & $\square$ neutral atom & $\square$ cation & $\square$ anion & 17 & 18 \\
\hline $\mathrm{Mn}^{3+}$ & $\square$ & neutral atom & $\square$ & cation & $\square$ anion \\
\hline
\end{tabular}
Solution
Solution Steps
Step 1: Determine the Missing Symbol for the First Row
The number of electrons is given as 48.
Since the number of electrons equals the number of protons in a neutral atom, the element with 48 protons is Cadmium (Cd).
Therefore, the symbol is \( \text{Cd} \).
Step 2: Identify the Type for the First Row
Since the number of protons equals the number of electrons (48), it is a neutral atom.
Check the box for "neutral atom."
Step 3: Determine the Missing Symbol for the Second Row
The number of protons is given as 17.
The element with 17 protons is Chlorine (Cl).
Therefore, the symbol is \( \text{Cl} \).
Step 4: Identify the Type for the Second Row
The number of electrons is 18, which is more than the number of protons (17).
This indicates that the species is an anion.
Check the box for "anion."
Step 5: Identify the Type for the Third Row
The symbol is given as \( \text{Mn}^{3+} \).
The \( 3+ \) charge indicates it is a cation.
Check the box for "cation."
Final Answer
For the first row: \( \text{Cd} \) (neutral atom)
For the second row: \( \text{Cl} \) (anion)
For the third row: \( \text{Mn}^{3+} \) (cation)