Transactinide Series Elements

**Definition:** A series of radioactive elements with atomic numbers greater than 103. Current members include Rutherfordium, atomic number 104, to and including Ununoctium, atomic number 118. All members are synthetic with short half-lives.

**Tree numbers:** - D01.268.271.935 - D01.496.749.305.935

**Synonyms:** - Transactinides - Transactinide Elements - Super Heavy Elements - Superheavy Elements