PT/Chem: Radioactive Elements - 21 Random

Type the Element name for the given symbol.
The 37 radioactive elements are #43, #61, and #84 thru #118.
Only four exist naturally on earth - Radon, Radium, Thorium, & Uranium.
See also PT/Chem: Elements 1-95 and PT/Chem: Symbols 1-15
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Sonmi42
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Last updated: March 13, 2026
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First submittedApril 18, 2024
Times taken143
Average score57.1%
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Atomic
#
Sym
Element
85
At
Astatine
112
Cn
Copernicium
111
Rg
Roentgenium
93
Np
Neptunium
104
Rf
Rutherfordium
103
Lr
Lawrencium
61
Pm
Promethium
102
No
Nobelium
90
Th
Thorium
109
Mt
Meitnerium
84
Po
Polonium
96
Cm
Curium
99
Es
Einsteinium
98
Cf
Californium
94
Pu
Plutonium
92
U
Uranium
113
Nh
Nihonium
114
Fl
Flerovium
97
Bk
Berkelium
106
Sg
Seaborgium
86
Rn
Radon
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