Californium is a metal.
Californium (Cf, 98th element) is a transuranic actinide, so it is a metal.Added:Cf is a synthetic radioactive metallic chemical element.
At room temperature californium is a solid metal.
Not californium, but neutrons emitted by californium.
Californium is radioactive and a strong neutrons emitter; californium can be lethal.
Californium is able to form a critical mass.
Californium is not flammable.
Californium is a metal.
Californium is not crucial.
Californium is not flammable.
Californium is not flammable.
Probably californium has a silvery white appearance but the pure metal was not obtained.