Classify each of the following solids as ionic,metallic,molecular,network (covalent) or amorphous.
$(i)$ Tetra phosphorus decoxide $(P_{4}O_{10})$ $(ii)$ Ammonium phosphate $(NH_{4})_{3}PO_{4}$
$(iii)$ $SiC$ $(iv)$ $I_{2}$ $(v)$ $P_{4}$ $(vi)$ Plastic $(vii)$ Graphite $(viii)$ Brass $(ix)$ $Rb$ $(x)$ $LiBr$ $(xi)$ $Si$

(N/A) The classification of the given solids is as follows:
$1$. Ionic: $(ii)$ $(NH_{4})_{3}PO_{4}$ and $(x)$ $LiBr$ (composed of ions held by electrostatic forces).
$2$. Metallic: $(viii)$ Brass (an alloy) and $(ix)$ $Rb$ (alkali metal).
$3$. Molecular: $(i)$ $P_{4}O_{10}$,$(iv)$ $I_{2}$,and $(v)$ $P_{4}$ (composed of discrete molecules held by van der Waals forces).
$4$. Network (Covalent): $(iii)$ $SiC$,$(vii)$ Graphite,and $(xi)$ $Si$ (composed of atoms linked by a continuous network of covalent bonds).
$5$. Amorphous: $(vi)$ Plastic (lacks a long-range ordered structure).