Questions: Fill in the missing information: symbol atom or ion? check all that apply number of protons number of electrons --- --- --- --- In neutral atom, cation, anion Br^- neutral atom, cation, anion neutral atom, cation, anion 5 2

Fill in the missing information:

symbol atom or ion? check all that apply number of protons number of electrons
--- --- --- ---
In neutral atom, cation, anion
Br^- neutral atom, cation, anion
neutral atom, cation, anion 5 2

Transcript text: Fill in the missing information: \begin{tabular}{|c|c|c|c|c|c|} \hline symbol & \multicolumn{3}{|l|}{\begin{tabular}{l} atom or ion? \\ check all that apply \end{tabular}} & \begin{tabular}{l} number of \\ protons \end{tabular} & \begin{tabular}{l} number of \\ electrons \end{tabular} \\ \hline In & $\square$ neutral atom. & $\square$ cation & $\square$ anion & $\square$ & $\square$ \\ \hline $\mathrm{Br}^{-}$ & $\square$ neutral atom & $\square$ cation & $\square$ anion & $\square$ & $\square$ \\ \hline$\square$ & $\square$ neutral atom & $\square$ cation & $\square$ anion & 5 & 2 \\ \hline \end{tabular}

Solution

Solution Steps

Step 1: Determine the Characteristics of Indium (In)

Indium (In) is a chemical element with atomic number 49, which means it has 49 protons. In its neutral state, it also has 49 electrons.

For a neutral atom: Check the "neutral atom" box.
For a cation: Indium can form cations by losing electrons, so check the "cation" box.
For an anion: Indium does not typically form anions, so do not check the "anion" box.

Step 2: Determine the Characteristics of Bromide Ion (

\mathrm{Br}^{-}

)

Bromine (Br) is a chemical element with atomic number 35, meaning it has 35 protons. The $\mathrm{Br}^{-}$ ion is an anion, indicating it has gained one electron, resulting in 36 electrons.

For a neutral atom: Do not check the "neutral atom" box.
For a cation: Do not check the "cation" box.
For an anion: Check the "anion" box.

Step 3: Identify the Element with 5 Protons and 2 Electrons

An element with 5 protons is Boron (B), which has an atomic number of 5. If it has 2 electrons, it is a cation with a charge of $3^+$ (since it has lost 3 electrons).

For a neutral atom: Do not check the "neutral atom" box.
For a cation: Check the "cation" box.
For an anion: Do not check the "anion" box.

Final Answer

$\begin{array}{|c|c|c|c|c|c|} \hline \text{symbol} & \multicolumn{3}{|l|}{\text{atom or ion?}} & \text{number of protons} & \text{number of electrons} \\ \hline \text{In} & \text{neutral atom} & \text{cation} & & 49 & 49 \\ \hline \mathrm{Br}^{-} & & & \text{anion} & 35 & 36 \\ \hline \text{B}^{3+} & & \text{cation} & & 5 & 2 \\ \hline \end{array}$

$\boxed{ \begin{array}{c} \text{In: Neutral atom, Cation, 49 protons, 49 electrons} \\ \mathrm{Br}^{-}: \text{Anion, 35 protons, 36 electrons} \\ \text{B}^{3+}: \text{Cation, 5 protons, 2 electrons} \end{array} }$

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