The total number of species from the following in which one unpaired electron is present, is _______.
$$\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$$
Answer (integer)
4
Solution
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<tr>
<th class="tg-amwm">Species</th>
<th class="tg-amwm">Unpaired e</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tg-baqh">$<br>\mathrm{N}_2<br>$</td>
<td class="tg-baqh">0</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{O}_2<br>$</td>
<td class="tg-baqh">2</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{C}_2^{-}<br>$</td>
<td class="tg-baqh">1</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{O}_2^{-}<br>$</td>
<td class="tg-baqh">1</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{O}_2^{2-}<br>$</td>
<td class="tg-baqh">0</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{H}_2^{+}<br>$</td>
<td class="tg-baqh">1</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{CN}^{-}<br>$</td>
<td class="tg-baqh">0</td>
</tr>
<tr>
<td class="tg-baqh">$<br>\mathrm{He}_2^{+}<br>$</td>
<td class="tg-baqh">1</td>
</tr>
</tbody>
</table></p>
About this question
Subject: Chemistry · Chapter: Chemical Bonding and Molecular Structure · Topic: Ionic and Covalent Bonding
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