Californium is an artificial element.
Californium is able to form a critical mass.
Californium don't help the earth !
Californium is an artificial element and is difficult to prepare and to separe this element.
Californium is an artificial chemical element !
Californium is a very rare and expensive man made metal. But because it is a strong radioactive element californium can be an environmental hazard in the case of an accident.
Californium is rare because it is a synthetic element that is not naturally occurring in the Earth's crust. It is produced in nuclear reactors or particle accelerators by bombarding other atoms with neutrons. Its rarity is also due to its short half-life and the difficulty in isolating and purifying it.
Californium is a radioactive metallic element with the atomic number 98. It is produced in nuclear reactors and has a silvery-white appearance. Californium is mainly used in neutron sources for scientific research and in industrial applications such as metal detectors.
Californium is an artificial element; the natural element exist only in infinitesimal traces in uranium ores.
Radioactive element of either Actinide/Lanthanide Series
One pound of californium weighs approximately 453.6 grams. Californium is a rare and highly radioactive element that is typically measured in very small quantities due to its scarcity and radioactivity.
If you need to ask, you probably can't. Californium is an extremely rare element produced in "atom smashers". If that doesn't suggest some possible sources to you, you don't have any business having any.
You know that little chart they showed you in class? The one with all the boxes with letters and numbers in them? What's it called, the periodic something or other? Yeah, use that.