Types of 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

Which of the following is a metallic crystal that has a shiny appearance?

• graphite

• gold

• ice

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

Metallic crystals are malleable and ductile.

• True

• False

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.

Metallic crystals are good conductors of electricity.

• True

• False