Classify each solid as a covalent, ionic, metallic, or molecular solid? Diamond, frozen carbon dioxide, pure sodium, and sodium sulfide

Md Ariful Islam

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Md Ariful Islam

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$CO_2(s)$ is molecular, with the individual molecules held together by (weak) dispersion forces.

Sodium exhibits ; i.e. positive ions in an electron sea, which gives rise to demonstrable malleability and ductility. (You can deform sodium metal with gloved hands!). Note that sodium, like all metals, is a NON-MOLECULAR material.

And sodium sulfide is also non-molecular, ionic solid composed of individual $2xxNa^+$ and $S^(2-)$ ions held together by strong electrostatic interaction between the positive and negative ions.

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