allotropes of carbon

What is allotropy?

• The property of an element to exist in two or more forms within the same physical state.

• The property of an element to change its physical state at different temperatures.

• The process by which an element combines with other elements to form compounds.

• The characteristic of an element to conduct electricity.

What type of crystal structure does diamond have?

• Hexagonal

• Cubic

• Tetrahedral

• Amorphous

What is the primary reason graphite is soft and slippery?

• Its carbon atoms form weak ionic bonds.

• Its layers of hexagonal rings are held together by strong covalent bonds.

• Its layers of hexagonal rings are spaced far apart and held by weak Van der Waals forces.

• It has a random, non-crystalline structure.

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What are cylindrically shaped fullerenes also known as?

• Buckyballs

• Graphite sheets

• Nanotubes

• Diamond rods

Which characteristic best describes amorphous carbon?

• It has a highly organized, repeating crystalline structure.

• It lacks a crystalline structure and does not arrange itself in a neat, repetitive pattern.

• It forms strong covalent bonds in a tetrahedral arrangement.

• It consists of layers held together by Van der Waals forces.