Livermorium

Livermorium is a synthetic, highly radioactive element first produced in 2000 by fusing calcium ions with a curium target. Only a few atoms have ever been made, and known isotopes decay in milliseconds. Its physical and chemical properties have not been measured directly; predictions suggest it may share some traits with lighter chalcogens, but this remains unconfirmed. Livermorium has no practical applications and is made only for scientific research.