Crystals Quiz

Which consists of carbon atoms?

• graphite

• diamond

• fullerene

• all of these

Which has a 2D hexagonal layered structure?

• graphite

• diamond

• fullerene

• all of these

Which has a every carbon atom covalently bonded to three others?

• graphite

• diamond

• fullerene

• two of these

Which has a 3D hexagonal structure?

• graphite

• diamond

• fullerene

• none of these

Which has every carbon atom covalently bonded to four other atoms?

• graphite

• diamond

• fullerene

• none of these

Which is extremely hard?

• graphite

• diamond

• fullerene

• none of these

Define the term allotropes

• Atoms with same proton number but different number of neutrons

• Atoms with same proton number but different mass number

• Atoms in different arrangement in structure

• Atoms in different arrangement and different physical form

Which statement is a true comparison of diamonds and graphite?

• diamonds are extremely hard and colorless where as graphite is a very soft gray substance.

• diamonds are extremely soft and colorless where as graphite is a very hard gray substance

• Diamonds are made only from carbon where as graphite is a carbon compound containing metal electrons

What is a crystal?

• A pure material that can’t be changed.

• Material with a regular, repeating arrangement of atoms.

• A foggy like material.

An amorphous solid has a definite melting point.

• True

• False