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Mathematics 12 Online
OpenStudy (anonymous):

when Marie curie isolated uranium from pitchblende, she realized that pitchblende was more radioactive than the uranium she had extracted. What did she conclude about her observations? A: Pitchblende itself is a radioactive element B: The pitchblende sample contained an unknown radioactive element C: The pitchblende sample was defective or D: Pitchblende should be used as radiation therapy. PLEASE HELP!

OpenStudy (cwrw238):

B

OpenStudy (anonymous):

Thank you!

OpenStudy (anonymous):

b

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