The correct orders among the following are
Atomic radius : $\mathrm{B}<\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$
Electronegativity : $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}<\mathrm{B}$
Density : $\mathrm{Tl}<\mathrm{In}<\mathrm{Ga}<\mathrm{Al}<\mathrm{B}$
1st Ionisation Energy : $\mathrm{In}<\mathrm{Al}<\mathrm{Ga}<\mathrm{Tl}<\mathrm{B}$
Choose the correct answer from the options given below:
Solution
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<col style="width: 153px">
<col style="width: 84px">
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<col style="width: 82px">
<col style="width: 78px">
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<tr>
<th class="tg-baqh"></th>
<th class="tg-baqh">B</th>
<th class="tg-baqh">Al</th>
<th class="tg-baqh">Ga</th>
<th class="tg-baqh">In</th>
<th class="tg-baqh">Tl</th>
</tr></thead>
<tbody>
<tr>
<td class="tg-0lax">Atomic radius (pm)</td>
<td class="tg-baqh">88</td>
<td class="tg-baqh">143</td>
<td class="tg-baqh">135</td>
<td class="tg-baqh">167</td>
<td class="tg-baqh">170</td>
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<td class="tg-0lax">Electronegativity</td>
<td class="tg-baqh">2</td>
<td class="tg-baqh">1.5</td>
<td class="tg-baqh">1.6</td>
<td class="tg-baqh">1.7</td>
<td class="tg-baqh">1.8</td>
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<td class="tg-0lax">Density (g/cm$^3$)</td>
<td class="tg-baqh">2.35</td>
<td class="tg-baqh">2.7</td>
<td class="tg-baqh">5.9</td>
<td class="tg-baqh">7.31</td>
<td class="tg-baqh">11.85</td>
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<td class="tg-0lax">Ionisation Energy (kJ/mol)</td>
<td class="tg-baqh">801</td>
<td class="tg-baqh">577</td>
<td class="tg-baqh">579</td>
<td class="tg-baqh">558</td>
<td class="tg-baqh">589</td>
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<p>$$\begin{array}{lc}
\text { Radius Order } & \mathrm{T} \ell>\mathrm{In}>\mathrm{A} \ell>\mathrm{Ga}>\mathrm{B} \\
\text { EN Order } & \mathrm{B}>\mathrm{T} \ell>\mathrm{In}>\mathrm{Ga}>\mathrm{Al} \\
\text { Density Order } & \mathrm{T} \ell>\mathrm{In}>\mathrm{Ga}>\mathrm{A} \ell>\mathrm{B} \\
\mathrm{IE}_1 \text { Order } & \mathrm{B}>\mathrm{T} \ell>\mathrm{Ga}>\mathrm{A} \ell>\mathrm{In}
\end{array}$$</p>
About this question
Subject: Chemistry · Chapter: Periodic Table and Periodicity · Topic: Periodic Trends
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