Britannica
Sources used in this answer
Which elements have atomic numbers greater than uranium's atomic number 92?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
transuranium element
Modern version of the periodic table of the elements (printable).
Elements with atomic numbers greater than 92 are known as transuranium elements. These elements are all radioactive and are primarily produced synthetically through nuclear reactions, as only trace amounts of neptunium and plutonium occur in nature.12
The known transuranium elements include:
- Actinoids (atomic numbers 93β103): neptunium (93), plutonium (94), americium (95), curium (96), berkelium (97), californium (98), einsteinium (99), fermium (100), mendelevium (101), nobelium (102), and lawrencium (103).13
- Transactinoids (atomic numbers 104 and higher): rutherfordium (104), dubnium (105), seaborgium (106), bohrium (107), hassium (108), meitnerium (109), darmstadtium (110), roentgenium (111), copernicium (112), element 113 (113), flerovium (114), element 115 (115), livermorium (116), element 117 (117), and element 118 (118).13
Scientific theory suggests that additional elements with even higher atomic numbers may exist, potentially up to 170β210, provided they are not precluded by nuclear instability.1