Asked by jeje

When Marie Curie Isolated uranium from pitchable, she realized that the [itchable was more radioactive than the uranium she had extracted. What did she conclude about her observations?

pitchblende itself is a radioactive element

the pitchblende sample contained an unknown radioactive the pitchblende sample was defected ***

pitchblende should be used as radiation therapy
Answered by Damon
Yes, in fact it was Thorium.
Answered by jeje
Ok thanks!
Answered by Hal
1. C
2. B
3. B
4. D
Unit 4 lesson 7
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