Questions: Fill in the missing information: symbol atom or ion? check all that apply number of protons number of electrons Al^2+ neutral atom cation anion neutral atom cation anion 33 33 neutral atom cation anion 53 54

Solution Steps

• \(\mathrm{Al}^{2+}\) is a cation.
• Aluminum (Al) has 13 protons.
• As a \(2+\) cation, it has lost 2 electrons, so it has \(13 - 2 = 11\) electrons.

• An atom with 33 protons is arsenic (As).
• Since it has an equal number of protons and electrons, it is a neutral atom.

• An atom with 53 protons is iodine (I).
• Since it has one more electron than protons, it is an anion with a \(1-\) charge, denoted as \(\mathrm{I}^{-}\).

\[ \begin{tabular}{|c|c|c|c|} \hline symbol & atom or ion? check all that apply & number of protons & number of electrons \\ \hline \mathrm{Al}^{2+} & \text{cation} & 13 & 11 \\ \hline \mathrm{As} & \text{neutral atom} & 33 & 33 \\ \hline \mathrm{I}^{-} & \text{anion} & 53 & 54 \\ \hline \end{tabular} \]

Final Answer