# science

Which statement best explains why dating geologic materials from the Quarternary Period uses a different radioactive isotope than for materials from the cambrian Period?

a. all rocks contain radioactive substances.

b. some isotopes decay faster than others.

c. not all isotopes form stable decay products

d. the decay of atoms occurs as a random event

i think it's b..

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asked by Angie
1. I think you are correct.
Statements b,c,and d are correct but only b answers the question.

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posted by DrBob222
2. thanks

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posted by Angie

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