Classify each of the following solids as ionic, metallic, molecular, network (covalent) or amorphous.

Ionic → (ii) Ammonium phosphate (NH₄)3PO₄, (x) LiBr 

Metallic → (viii) Brass, (ix) Rb 

Molecular → (i) Tetra phosphorus decoxide (P₄O₁₀), (iv) I₂, (v) P₄. 

Covalent (network) → (iii) SiC, (vii) Graphite, (xi) Si 

Amorphous → (vi) Plastic

1. Tetra phosphorous decoxide (P₄O₁₀) = Molecular solid 

2. Ammonium Phosphate (NH₄)₃PO₄ = Ionic solid 

3. SiC = Covalent solid 

4. I₂ = Molecular solid 

5. P₄ = Molecular solid 

6. Plastic Amorphous solid 

7. Graphite = Covalent solid 

8. Brass = Metallic solid 

9. Rb = Metallic solid

10. LiBr = Ionic solid 

11. Si = Covalent solid