In general the property (magnitudes only) that show an opposite trend in comparison to other properties across a period is
Solution
<p>Across a period (left to right) in the periodic table :</p>
<p><p><strong>Ionization enthalpy</strong> tends to <strong>increase</strong> </p></p>
<p><p><strong>Electron gain enthalpy</strong> (in magnitude) tends to <strong>increase</strong> (more negative values) </p></p>
<p><p><strong>Electronegativity</strong> tends to <strong>increase</strong> </p></p>
<p><p><strong>Atomic radius</strong> tends to <strong>decrease</strong> </p></p>
<p>Hence, <strong>atomic radius</strong> shows the <strong>opposite</strong> trend compared to the other three properties. Therefore, the correct answer is</p>
<p><strong>(D) Atomic radius.</strong></p>
About this question
Subject: Chemistry · Chapter: Periodic Table and Periodicity · Topic: Periodic Trends
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