Crystals

What type of crystal structure does graphite have?

• giant molecular

• ionic

• metallic

• simple molecular

Giant molecular crystals in general have a high melting and boiling point.

• True

• False

Metallic crystals in general are good conductors of heat and electricity.

• True

• False

What type of crystal structure does iron have?

• Ionic crystal

• metallic crystal

• giant molecular crystal

• simple molecular crystal

Diamond is extremely hard because...

• it has weak covalent bonds

• it has ionic bonds

• it has strong covalent bonds

• it is indestructible

The mobile valence electrons in metallic crystals are referred to as

• electrode

• carbon atoms

• delocalized electrons

A giant molecular crystal are composed of

• non metal atoms bonded by strong covalent bonds.

• metal atoms bonded by strong covalent bonds.

• metal and non metal atoms bonded by strong covalent bonds.

Describe the characteristics of an ionic crystal.

• Ionic crystals are malleable

• Ionic crystals have low melting and boiling points

• Ionic crystals are composed of positively and negatively charged ions held together by electrostatic forces. They have high melting and boiling points, are brittle, and conduct electricity when molten or in solution.

• Ionic crystals are composed of covalently bonded atoms

What is a crystal lattice?

• A type of rock formation in which crystals can be found

• An ordered, repeating pattern of molecules

• A collection of different types of crystals

• A grouping of molecules with a shifting structure