T

Transuranium Elements

Quick Reference
Also Known AsTransuranic elements, superheavy elements (heaviest transuranic), post-uranium elements, actinide elements (94+)

What is Transuranium Elements?

Transuranium elements (also called transuranic elements) are the chemical elements with atomic numbers greater than 92 (uranium). All transuranium elements are radioactive and most are artificially produced through nuclear reactions (neutron or heavy-ion bombardment). They include elements like neptunium (93), plutonium (94), americium (95), and all subsequent elements up to oganesson (118).

Properties & Characteristics

Atomic numbers: 93 (Np) to 118 (Og). All radioactive — no stable isotopes. Produced by: neutron capture + beta decay (Np, Pu from U-238 in reactors) or heavy-ion bombardment (heavier transuranic). Half-lives vary: Pu-239: 24,100 yr; Am-241: 432 yr; Cm-248: 340,000 yr. f-block actinide series or beyond.

Uses & Applications

Nuclear fuel and weapons: Pu-239 is primary nuclear fuel/weapon material. Medical diagnostics: Am-241 in smoke detectors. Cancer therapy: Cf-252 for neutron brachytherapy. Scientific research: superheavy element synthesis (discovering new elements). Space exploration: Pu-238 in RTGs (radioisotope thermoelectric generators).

Safety Information

Highly radioactive — alpha, beta, gamma and neutron emitters. Alpha emitters (Pu, Am, Cm) highly toxic internally — bone seekers, lung cancer if inhaled. Plutonium: extreme radiotoxicity, criticality risk (Pu-239). Strict regulatory controls. No safe handling without specialized facilities.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Transuranium Elements
Synonyms Transuranic elements, superheavy elements (heaviest transuranic), post-uranium elements, actinide elements (94+)

Frequently Asked Questions

Transuranium elements (also called transuranic elements) are the chemical elements with atomic numbers greater than 92 (uranium). All transuranium elements are radioactive and most are artificially produced through nuclear reactions (neutron or heavy-ion bombardment). They include elements like neptunium (93), plutonium (94), americium (95), and all subsequent elements up to oganesson (118).

More "T" Terms

View all "T" terms →
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z