I need help please!!! What did Becquerel discover about uranium? A.)All uranium

Question

I need help please!!!

What did Becquerel discover about uranium?

A.)All uranium salts would expose photographic film with or without exposure to light.

B.) Fluorescent light can pass right through the light proof covering used then for photographic plates.

     C.)Some uranium salts fluoresced in sunlight.

D.)X rays striking some uranium salts produced visible light.

E.) All uranium salts fluoresced in sunlight.

On page 526 of your textbook, you learned that one gram of radium produces over a million times the radiation as does one gram of uranium. This means that a much larger fraction of radium atoms are undergoing radioactive decay each second than for uranium. How does the half-life of radium compare to the half-life of uranium?

A.) The half-life of radium is the same as the half-life of uranium.

B.) The half-life of the radium is shorter at first, but gets longer as the radium sample is depleted.

     C.) The half-life of radium is much smaller than the half-life of uranium.

D.) The half-life of radium is much larger than the half-life of uranium.

E.) The information is insufficient to answer the question.

This figure shows a graph of the number of gamma rays surviving at various distances through a material. How thick must a sheet of aluminum be to remove 7/8 of the photons in a beam of gamma rays with an energy of 5 MeV?

A.) 45.5 cm

B.) 9.1 cm    

C.) 27.3 cm

D.) 18.2 cm

E.)36.4 cm     

Explanation / Answer

A.)All uranium salts would expose photographic film with or without exposure to light.

C.) The half-life of radium is much smaller than the half-life of uranium.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.