Radioactive element resembling argon
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AnswerCrossword Clue
RADONRadioactive element resembling argon.
actiniumradioactive silver-white metallic element that glows blue in the dark, resembling the rare earths in chemical behavior and valence. Symbol: Ac; at. no.: 89; at. wt.: 227
NEONElement between helium and argon on the periodic table
PLUTONIUMRadioactive element
NOBELIUMRadioactive element
ASTATINERadioactive element
URANIUMRadioactive element.
RADONRadioactive element.
NITONRadioactive element
RADONRadioactive element
CALIFORNIUMRadioactive element
URANIUMRadioactive element
CERIUMRadioactive element
RADONGaseous radioactive element
illiniuma radioactive element
radiumradioactive metallic element
radiumsradioactive metallic element
TRACERRadioactive element, at times
THORIUMRadioactive element no. 90.
POLONIUMRadioactive element in pitchblende.
URANIUMRadioactive element No. 92.
URANOUSOf a radioactive element
URANOUSContaining a radioactive element
nobeliumsNOBELIUM, a radioactive element
dubniumsDUBNIUM, a radioactive element
radiumsRADIUM, a radioactive element
fermiumsFERMIUM, a radioactive element
franciumsFRANCIUM, a radioactive element
hassiumsHASSIUM, a radioactive element
illiniumsILLINIUM, a radioactive element
poloniumsPOLONIUM, a radioactive element
bohriumsBOHRIUM, a radioactive element
radioelementsRADIOELEMENT, a radioactive element
curiumsCURIUM, a radioactive element
hahniumsHAHNIUM, a radioactive element
radonsRADON, a radioactive element
astatinesASTATINE, a radioactive element
nitona gaseous radioactive element
IONIUMRadioactive element discovered in 1907.
PLUTONIUMRadioactive element isolated in 1940.