Properties Of Solids

Step 1: Understanding the classification.
Solids are broadly classified as: -
Ionic solids: Composed of cations and anions held by electrostatic forces.
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Metallic solids: Composed of metal atoms with mobile electrons (metallic bonding).
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Molecular solids: Composed of discrete molecules held by van der Waals forces or hydrogen bonds.
Step 2: Classify each given substance.
\begin{tabular}{|c|c|} \hline Substance &
Type of Solid
\hline P & Molecular solid
\hline Ammonium phosphate & Ionic solid
\hline Brass & Metallic solid (alloy of Cu and Zn)
\hline Tetraphosphorus decoxide (P O ) & Molecular solid
\hline Rb (Rubidium) & Metallic solid
\hline I & Molecular solid (van der Waals forces)
\hline LiBr & Ionic solid
\hline \end{tabular} Conclusion:
- Ionic solids: Ammonium phosphate, LiBr
- Metallic solids: Brass, Rb
- Molecular solids: P , P O , I