state the difference between crystalline and non crystalline forms of carbon
Answers
Answer:
Crystalline form of carbon is definite in molecular structure, but non-crystalline isn't. Molecules in non-crystalline form are arranged randomly without any fixed pattern or shape. This form is also called amorphous form of carbon.
Answer: DIAMOND
Diamond has a giant molecular, giant covalent or giant atomic structure. the melting point of diamond is very high, this is because, in diamond the structure is not made of small molecules where it is easy to break the weak van der Waals' forces where as the strong covalent bonds between the carbon atoms have to be broken when diamond is melted and this requires very high temperatures.
In fact diamond does not melt but it sublimes at 3550 degrees celcious
GRAPHITE
graphite is held together by weak van der Waals' forces.
these layers readily slide over one another accounting for the greasy texture of graphite.
graphite conducts electricity in plane of the layers but not at right angels to them, this is due to delocalised [spread out] electrons extending along the layers thus free to move through the layers
Explanation: PROPERTIES OF;
1) GRAPHITE
Graphite is a colorless crystalline solid
graphite is a black solid
has a high melting point
soft slippery substances often used in lubrication; it feels soapy and greasy
conducts electricity
2)DIAMOND
has a high melting and boiling point
diamond is the hardest naturally occurring substance
does not conduct electricity