Questions: Select the molecular solid(s). Check all that apply. LiF Sodium NH3 Diamond (C) None of the above

Transcript text: Select the molecular solid(s). Check all that apply. LiF Sodium $\mathrm{NH}_{3}$ Diamond $(\mathrm{C})$ None of the above

Solution

Step 1: Identify the Type of Solids

To determine which of the given substances are molecular solids, we need to understand the types of solids each substance forms:

LiF (Lithium Fluoride): This is an ionic solid because it consists of lithium ions (Li$^+$) and fluoride ions (F$^-$).
Sodium (Na): This is a metallic solid because it consists of sodium atoms held together by metallic bonds.
NH$_3$ (Ammonia): This is a molecular solid because it consists of ammonia molecules held together by intermolecular forces (hydrogen bonds).
Diamond (C): This is a covalent network solid because it consists of carbon atoms bonded together in a continuous network.

Step 2: Select the Molecular Solid(s)

From the analysis above, the only molecular solid is NH$_3$.