The answer is A. Continuum
Answer:
The unknown radioactive element is present in pitchblende.
Explanation:
Marie Curie was the scientists that mainly worked on the radioactive element. She was the first scientist who won the noble prize in two different fields of science.
The pitchblende was the mineral sample that was noticed by Marie curie during her experiment. Pitchblende contains a more radioactive element that uranium and confirms that she had found a new element.The new element was polonium with hundred times more radioactive than uranium.
Thus, the answer is unknown radioactive element is present in pitchblende.
Correct - Jana: She has a positive (prideful) outlook on herself, despite the fact that it may seem conceited, that's actually a good thing in the right case.
Kurt/Maxine: We know nothing of their mentality, just interests.
Ryan: He's disciplined, but we don't know anything about his mentality.
True. However sometimes you could just be over using your body and causing stress to your muscles and bones therefore causing injuries a different way.
