Element discovered in 1812
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AnswerCrossword Clue
BORONElement discovered in 1812
ERBIUMElement discovered in 1843
RADIUMElement discovered in 1898
EINSTEINIUMElement discovered in 1952
NEONElement discovered in 1898
RADIUMMetallic element discovered in 1902.
IONIUMRadioactive element discovered in 1907.
mendeleviuman unstable radioactive element discovered in 1955
mendeleviumsMENDELEVIUM, an unstable radioactive element discovered in 1955
lawrenciuma transuranic element, atomic no. 103, discovered in 1961
lawrenciumsLAWRENCIUM, a transuranic element, atomic no. 103, discovered in 1961
poradioactive element discovered by Pierre and Marie Curie in 1898; Symbol: Po; at. no.: 84; at. wt.: about 210
poloniumradioactive element discovered by Pierre and Marie Curie in 1898; Symbol: Po; at. no.: 84; at. wt.: about 210
curiumradioactive element not found in nature but discovered in 1944 among the products of plutonium after bombardment by high-energy helium ions. Symbol: Cm; at. no.: 96
curiumsradioactive element not found in nature but discovered in 1944 among the products of plutonium after bombardment by high-energy helium ions. Symbol: Cm; at. no.: 96
einsteiniumThe chemical element of atomic number 99, a radioactive metal of the actinide series. Einsteinium does not occur naturally and was discovered in 1953 in debris from the first hydrogen bomb explosion
neptuniumThe chemical element of atomic number 93, a radioactive metal of the actinide series. Neptunium was discovered as a product of the bombardment of uranium with neutrons, and occurs only in trace amounts in nature