Transuranic

Transuranics are a series of chemical elements with an atomic number greater than 92 (uranium). Transuranic elements are generally unstable and radioactive. A stable transuranic element in nature is the 247th element known to the Federation, discovered by the USS Voyager in the rings of a gas giant in the Delta Quadrant in 2371. 

The Paulson Nebula contains transuranics. 

List of transuranic elements

 * #93: neptunium (Np)
 * #94: plutonium (Pu)
 * #95: americium (Am)
 * #96: curium (Cm)
 * #97: berkelium (Bk)
 * #98: californium (Cf)
 * #99: einsteinium (Es)
 * #100: fermium (Fm)
 * #101: mendelevium (Md)
 * #102: nobelium (No)
 * #103: lawrencium (Lr)
 * #104: rutherfordium (Rf)
 * #105: dubnium (Db)
 * #106: seaborgium (Sg)
 * #107: bohrium (Bh)
 * #108: hassium (Hs)
 * #109: meitnerium (Mt)
 * #110: darmstadtium (Ds)
 * #111: roentgenium (Rg)
 * #112: ununbium (Uub)
 * #113: ununtrium (Uut)
 * #114: ununquadium (Uuq)
 * #115: ununpentium (Uup)
 * #116: ununhexium (Uuh)
 * #117: ununseptium (Uus)
 * #118: accurentum (Uuo)
 * #120: bugsonium (Bu)
 * #123: jamesium (Rj)
 * #156: drapanasum (Wy)
 * #164: brownfieldium (Uhq)
 * #189: meesium (Da)
 * #230: poium (Btn)
 * #247: element 247 (Bqs)
 * averyonium
 * berium
 * bermanium
 * cavorite
 * chanockium (Ed)
 * chronisterium (Fx)
 * cosmium
 * craftium
 * dentium
 * dilithium (Dt)
 * disneyum
 * element Ab
 * element Di
 * element Ef
 * element Mr
 * element Mx
 * element Py
 * element St
 * element Sw
 * element Sy
 * estonianium
 * fieldium (Wc)
 * franconium
 * freedonium
 * johnsonium
 * jonesium
 * keiyurium (Ke)
 * kryptonite
 * mazdanium (Rx)
 * neskoromnium (An)
 * pergium
 * pillerium (Mi)
 * potatoeium (Qu)
 * purseronite (Tm)
 * quarkium (Qk)
 * rhubarium
 * smutkoium
 * snarkium (Sn)
 * stimsonium (Ma)
 * thomsonium
 * ultritium
 * yacobium

Transuranen