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
1. C
2. B
3. B
4. D
Unit 4 lesson 7
Yes, in fact it was Thorium.
Ok thanks!
To answer the question, it is important to understand the process Marie Curie followed and the observations she made.
Marie Curie was conducting experiments to isolate radioactive elements from a mineral called pitchblende. She extracted uranium from pitchblende and noticed that the pitchblende residue remaining after the extraction was more radioactive than the uranium itself.
Based on these observations, Marie Curie concluded that there must be other unknown radioactive elements present within the pitchblende. She hypothesized that these unidentified elements were responsible for the increased radioactivity of the leftover pitchblende residue.
Therefore, the correct conclusion from Marie Curie's observations is: The pitchblende sample contained an unknown radioactive element(s).