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1. By whom was radium discovered?

Marie and Pierre Curie.

2. In what year was radium first discovered?

1898.

3. Why was radium such a scarce resource?

Radium was very difficult to extract from its source.

4. What adjective did the discoverer of radium use often to describe the element?

Beautiful.

5. What color was the mark the scientist found on his skin in 1901 after keeping a piece of radium in his pocket, as described in the book's prologue?

Red.

6. In what city was the Radium Luminous Materials Corporation located?

Newark, New Jersey.

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