What did the Curies demonstrate by studying pitchblende?

What did the Curies demonstrate by studying pitchblende?

A- Uranium is not the only radioactive element. B- All elements are potentially radioactive. C-Radium can cause anemia, bone and tissue damage, and death. D-Uranium salts emit something that can expose photographic film.

Answers

A- Uranium is not only the radioactive element

a on edge

Explanation:

500bc indiais the answer.
Only one reactant yields 2 or more products. meaning you will only have 1 product and it will break down into 2 or more products. eg. h2o -> h2 + o2

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