Question: It takes 6 4 0 0 years for one gram of a radioactive element to decay away to only 1 / 1 6 of a

It takes 6400 years for one gram of a radioactive element to decay away to only 1/16 of a gram. The half-life of this element is
Group of answer choices
400 years
1600 years
800 years
None of these answers are correct.
3200 years

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