What is the californium?

 Is a radioactive  metallic chemical element with the symbol Cf and atomic  number  98. The element was first made at the University of California Berqueley in 1950 by bombarding curium with alpha particles (helium-4 ions). It is an actinide element, the sixth transuranium element to besynthesized,and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye(after einsteinium). The element was named after California  and the University of California. It is the heaviest element to occur naturally on Earth; heavier elements can only be produced by synthesis.

https://en.wikipedia.org/wiki/Californium



http://www.chemicool.com/elements/californium.html

Physical properties

Californium is a silvery white actinide metal[10] with amelting point of 900 ± 30 °C and an estimated boiling point of 1745 K.[11] The pure metal is malleable and is easily cut with a razor blade. Californium metal starts to vaporize above 300 °C when exposed to a vacuum.[12] Below 51 K (−220 °C) californium metal is either ferromagnetic or ferrimagnetic (it acts like a magnet), between 48 and 66 K it is antiferromagnetic(an intermediate state), and above 160 K (−110 °C) it is paramagnetic (external magnetic fields can make it magnetic).[13] It forms alloys with lanthanide metals but little is known about them.[

https://en.wikipedia.org/wiki/Californium



http://periodictable.com/Elements/098/