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News and Discussions => History & Trivia => Topic started by: Marlin on Mar 20, 2009, 08:16

Title: Manmade elements
Post by: Marlin on Mar 20, 2009, 08:16
A transuranic is an artificially made, radioactive element that has an atomic number higher than uranium in the periodic table of elements such as neptunium, plutonium, americium, and others. There are two elements with atomic numbers below uranium that are not natural on earth that are artificially made. What are they?
Title: Re: Manmade elements
Post by: Nuclear Renaissance on Mar 20, 2009, 08:55
technetium (Tc), 43
promethium (Pm), 61

---- uranium (U), 92 ----

neptunium (Np), 93
plutonium (Pu), 94
americium (Am), 95
curium (Cm), 96
berkelium (Bk), 97
californium (Cf), 98
einsteinium (Es), 99
fermium (Fm), 100
mendelevium (Md), 101
nobelium (No), 102
lawrencium (Lr), 103
unnilquadium (Unq), 104
unnilpentium (Unp), 105
unnilhexium (Unh), 106
unnilseptium (Uns), 107
unniloctium (Uno), 108
unnilennium (Une), 109
unununium (Uun), 110
Title: Re: Manmade elements
Post by: Marlin on Mar 20, 2009, 10:20
This one was much to easy I will have to try harder. Good Job!!