Answer: radium

AnswerCrossword Clue
RADIUM

Decaying metal

RADIUM

Element discovered by the Curies

RADIUM

Curies' discovery

RADIUM
Curie discovery
RADIUM
Element discovered in 1898
RADIUMMetallic element discovered in 1902.
RADIUMProduct of pitchblende.
RADIUM1898 discovery.
RADIUMAtomic Number 88.
RADIUMDiscovery of 1898.
RADIUMCurie's discovery
RADIUMCuries' find
RADIUMDiscovery of 1898
RADIUMAlpha particle emitter
RADIUMBygone component in luminous paint
RADIUM1898 chemistry discovery
RADIUMElement discovered by Marie and Pierre Curie
RADIUMSubject of Marie Curie's isolation