Question

I need this ASAP please!!!!!
What type of crystalline solid do you predict would best suit the following needs?
(a) A material that can be melted and reformed at a low temperature.
1)ionic solid
2)molecular solid
3)metallic solid
4)covalent network solid
(b) A material that can be drawn into long, thin wires.
1)ionic solid
2)molecular solid
3)metallic solid
4)covalent network solid
(c) A material that conducts electricity when molten.
1)ionic solid
2)molecular solid
3)metallic solid
4)covalent network solid
(d) An extremely hard material that is non-conductive.
1)ionic solid
2)molecular solid
3)metallic solid
4)covalent network solid

Answer 1

       

(a) A material that can be melted and reformed at a low temperature.

1)ionic solid      

2) molecular solid  

3)metallic solid  

4)covalent network solid

(b) A material that can be drawn into long, thin wires.  

1)ionic solid  

2)molecular solid  

3)metallic solid

4)covalent network solid

(c) A material that conducts electricity when molten.

1)ionic solid  

2)molecular solid  

3)metallic solid  

4)covalent network solid  

(d) An extremely hard material that is non-conductive.

1)ionic solid  

2)molecular solid  

3)metallic solid  

4)covalent network solid

Answer 2

Answer:

A- molecular solid

B-metallic solid

C-ionic solid

D-covalent network solid

Explanation:

A molecular solid is held together by weak vanderwaals forces. It can be melted easily but reformed at low temperature when the kinetic energy of molecules is sufficiently reduced. An ionic solid is a network of oppositely charged ions linked together into a three dimensional rigid network. The ions are immobile hence it cannot conduct electricity in the solid state. When the solid melts, the ions become free hence it can now conduct electricity. Metals can be drawn into wire (ductility), this is a fundamental property of metals. Covalent network solid are hard and often have no free valence electrons e.g diamond. They do not conduct electricity