Lawrencium

Lawrencium is a radioactive, synthetic metal related to the actinides. It does not occur naturally in usable amounts and must be made a few atoms at a time in particle accelerators by bombarding a heavier element with charged particles. Its atoms decay quickly: even the longest-lived known isotope lasts only about 11 hours. Because so little can be produced and it disappears so rapidly, lawrencium has no practical uses outside scientific research. Chemists have studied its ions and found that it commonly forms a +3 charge, behaving much like the rare-earth metal lutetium.