Question

1 . Write two properties of metallic solids .
2 . Give Reason :- Covalent solids are poor conductor of heat and electricity .
3 . Explain ABAB type of three dimensional packing .​

Answer 1

Answer:

Characteristics of Metallic Solids:

They possess high melting and boiling points. Thy show high thermal conductivity. They show high electrical conductivity. They are malleable and ductile.

Covalent compounds are generally poor conductors of electricity because they do not produce ions in solution or on melting.

In this kind of close packing in solids, the spheres of the third layer are exactly aligned with those of the first layer. Thus, if we name the first layer as 'A' and second as 'B', then the third layer can again be named as 'A'. This pattern can be written as ABAB ……. pattern.

Answer 2

1. Characteristics of Metallic Solids

2. Covalent compounds are generally poor conductors of electricity because they do not produce ions in solution or on melting.

3. In this kind of close packing in solids, the spheres of the third layer are exactly aligned with those of the first layer. Thus, if we name the first layer as 'A' and second as 'B', then the third layer can again be named as 'A'. This pattern can be written as ABAB ……. pattern.

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