Question

Carbon­14 has a half­life of 5,730 years. if the age of an object older than 50,000 years cannot be determined by radiocarbon dating, then

Answer 1

The answer choices are:

A. carbon-14 levels in a sample are undetectable after approximately fourteen half-lives.

B. carbon-14 levels in a sample are undetectable after approximately nine half-lives.

C. the half-life of carbon-14 is too long to accurately date the object.

D. a radioisotope with a shorter half-life should be used to date the object.

I believe the answer would most certainly be C. the half-life of carbon-14 is too long to accurately date the object. I believe this is the answer because we haven't even lived for 5,730 years, and nobody lives that long to prove that it is true. So, it is WAY too long to accurately date the object

Answer 2

if the age of an object older than 50,000 years cannot be determined by carbon dating, then a radioisotope with shorter half-life should be used to date the object.
50,000 years x 1 halflife/5,370 years = half0lives