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Assertion: The melting points of the Carbon family elements increase down the group.
Reason: The metallic bonding becomes stronger down the group due to the increased number of valence electrons.
Both assertion and reason are true and the reason is the correct explanation for the assertion.
Both assertion and reason are true, but the reason is not the correct explanation for the assertion.
The assertion is true, but the reason is false.
The assertion is false, but the reason is true.
Answers (1)
The assertion is true because the melting points of the Carbon family elements increase as we move down the group. For example, the melting point of carbon is 3500 °C, while the melting point of lead is 327 °C. This trend can be explained by the increasing strength of metallic bonding as we move down the group.
The reason is also true because metallic bonding is due to the electrostatic attraction between the positively charged metal ions and the delocalized electrons. As we move down the group, the number of valence electrons increases, and the atomic radius also increases, which leads to a larger number of energy levels in the atom. These factors result in a stronger metallic bonding, which leads to higher melting points.
Therefore, the reason correctly explains why the assertion is true.
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