Jan 22, 2017

Classification of crystalline solids
(Criteria - Type of constituent particles and nature of bondage existing between them )

Details in a tabular form

Now let us classify our given solids and view their crystal structures.

1.Sodium sulfide, ${N}_{2} S \implies \textcolor{red}{\text{(IONIC)}}$
The constituent particles, $N {a}^{+} \mathmr{and} {S}^{\text{2-}}$ ions are associated with ionic bondage .

2. Carbon tetrachloride, $C C {l}_{4} \implies \textcolor{red}{\text{(MOLECULAR)}}$
The constituent particles are tetrahedral $C C {l}_{4}$ molecules associated with vander waal's forces .

3, Calcium metal, $C a \implies \textcolor{red}{\text{(METALLIC)}}$
In this crystal $C {a}^{\text{2+}}$ ions are boded with metallic bonds , where cations are in the sea of delocalized valence electrons of the metal atoms existing in the piece of crystal.

4. C(diamond), $\implies \textcolor{red}{\text{(COVALENT-NETWORK)}}$

Here $C$ atoms are connected incovalent bond network where each C atom is linked with 4 C atoms tetrahdrally by strong covalent bond .