Questions: Isotope Notation Atom, Cation, or Anion? No. of Protons No. of Neutrons e- gained, lost, or remain the same --------------- ^80 mathrmSe I ^80 mathrmSe^-2

Transcript text: \begin{tabular}{|c|c|c|c|c|} \hline \begin{tabular}{l} Isotope \\ Notation \end{tabular} & \begin{tabular}{l} Atom, Cation, or \\ Anion? \end{tabular} & No. of Protons & No. of Neutrons & \begin{tabular}{l} e- gained, lo \\ remain the s \end{tabular} \\ \hline \begin{tabular}{l} ${ }^{80} \mathrm{Se}$ \end{tabular} & I & & & \\ \hline \begin{tabular}{l} ${ }^{80} \mathrm{Se}^{-2}$ \end{tabular} & & & & \\ \hline \end{tabular}

Solution

Solution Steps

Step 1: Determine the Number of Protons

The number of protons in an isotope is determined by its atomic number. Selenium (Se) has an atomic number of 34, which means it has 34 protons.

Step 2: Determine the Number of Neutrons

The number of neutrons in an isotope is calculated by subtracting the number of protons from the mass number. For the isotope ${ }^{80} \mathrm{Se}$, the mass number is 80. Therefore, the number of neutrons is $80 - 34 = 46$.

Step 3: Determine the Type of Particle

${ }^{80} \mathrm{Se}$ is a neutral atom because it is not indicated to have any charge.
${ }^{80} \mathrm{Se}^{-2}$ is an anion because it has a $-2$ charge, indicating it has gained 2 electrons.

Step 4: Determine the Number of Electrons

For ${ }^{80} \mathrm{Se}$, the number of electrons is equal to the number of protons, which is 34.
For ${ }^{80} \mathrm{Se}^{-2}$, the number of electrons is $34 + 2 = 36$ because it has gained 2 electrons.

Final Answer

For ${ }^{80} \mathrm{Se}$:
- Atom, Cation, or Anion: Atom
- Number of Protons: 34
- Number of Neutrons: 46
- Electrons gained, lost, or remain the same: Remain the same
- $\boxed{\text{Atom, 34 protons, 46 neutrons, electrons remain the same}}$
For ${ }^{80} \mathrm{Se}^{-2}$:
- Atom, Cation, or Anion: Anion
- Number of Protons: 34
- Number of Neutrons: 46
- Electrons gained, lost, or remain the same: Gained 2 electrons
- $\boxed{\text{Anion, 34 protons, 46 neutrons, gained 2 electrons}}$

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