Which statements best describe the work of Marie and Pierre Curie? Check all that apply.They discovered radioactivity.They came up with the term “radioactivity.”They conducted experiments with uranium-containing minerals and pure uranium.They conducted experiments with uranium-containing minerals and photographic plates.They discovered two new radioactive elements.
Which statements best describe the process of radioactive decay? Check all that apply.An unstable isotope changes until it reaches a different element that is unstable.An unstable isotope changes until it reaches a different element that is stable.A stable isotope changes until it reaches a different element that is unstable.A stable isotope changes until it reaches a different element that is stable.An unstable isotope changes until it reaches a different isotope of the same element that is unstable.An unstable isotope changes until it reaches a different isotope of the same element that is stable.
The half-life of carbon-14 is 5730 years. How long will it take for 7/8 of a sample of carbon-14 to decay?
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