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Which element chemically resembles radium, making radium separation difficult?
Answer
barium
Which element chemically resembles polonium, helping Curie separate it from ore?
Answer
bismuth
Which mineral did Marie Curie find to be twice as active as uranium itself?
Answer
chalcolite
Which German chemist discovered thorium's radioactivity two months before Marie Curie?
Answer
Gerhard Carl Schmidt
Which element's radioactivity did Marie Curie observe in 1898 besides uranium?
Answer
thorium
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Which German chemist discovered thorium's radioactivity two months before Marie Curie?
Answer
Gerhard Carl Schmidt
What did Marie Curie call the rays emitted by uranium compounds?
Answer
Becquerel rays
Which uranium compound was used in Becquerel's accidental dark-drawer experiment?
Answer
potassium uranyl sulfate
Which French institution received Becquerel's first 1896 reports on uranium rays?
Answer
French Academy of Sciences
What name is given to the spontaneous breakup of an unstable atomic nucleus?
Answer
radioactive decay
Which country was Henri Becquerel from?
Answer
France