What important result did Becquerel observe when he placed the uranium salt crystals and unexposed photographic film in a drawer?

-The crystals phosphoresced within the drawer and exposed the film.
-The crystals did not phosphoresce within the drawer but did expose the film.
-The crystals phosphoresced within the drawer but did not expose the film.
-The crystals did not phosphoresce within the drawer and did not expose the film.

Question

01-12-2016
Chemistry

contestada

What important result did Becquerel observe when he placed the uranium salt crystals and unexposed photographic film in a drawer?

-The crystals phosphoresced within the drawer and exposed the film.
-The crystals did not phosphoresce within the drawer but did expose the film.
-The crystals phosphoresced within the drawer but did not expose the film.
-The crystals did not phosphoresce within the drawer and did not expose the film.

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jacob192 jacob192 · Answer 1 · 2018-07-11T18:26:20+02:00

jacob192 jacob192

11-07-2018

B) The crystals did not phosphoresce within the drawer but did expose the film

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sarajevo sarajevo · Answer 2 · 2019-04-07T16:15:53+02:00

sarajevo sarajevo

07-04-2019

The correct answer is "The crystals did not phosphoresce within the drawer but did expose the film."

Becquerel is credited to have discovered radioactivity. Becquerel was studying the properties of x-ray using naturally fluorescent minerals. Uranium shows radioactive decay. It is the high energy invisible radiation from uranium that exposed the photographic film.

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