- It is malleable, ductile, and can be cut with a knife.
- It is the most reactive of the rare earth metals.
- It reacts with carbon, nitrogen, boron, selenium, silicon, phosphorus, sulfur and the halogens.
- When exposed to air, it will oxidize very quickly.
- It reacts slowly to cold water, but rapidly with hot water.
- It plays no biological role.
- It is somewhat toxic and should be handled with care.