Which of the following statements about the use of sodium is FALSE?
◦ Sodium vapor lamps are used outdoors.
◦ Sodium is used in reactors because it has a low melting point.
◦ Sodium is used in reactors because it has a high boiling point.
◦ Sodium is used in reactors because it has a high thermal conductivity.
◦ A typical sodium vapor lamp uses several grams of sodium.