Questions on carbon dating
Signals of this kind are often used by chemists studying natural environments.
If something carbon dates at 7,000 years we believe 5,000 is probably closer to reality (just before the flood).
They have masses of 13 and 14 respectively and are referred to as "carbon-13" and "carbon-14." If two atoms have equal numbers of protons but differing numbers of neutrons, one is said to be an "isotope" of the other.
Carbon-13 and carbon-14 are thus isotopes of carbon-12.
For object over 4,000 years old the method becomes very unreliable for the following reason: Objects older then 4,000 years run into a problem in that there are few if any known artifacts to be used as the standard.
Libby, the discoverer of the C14 dating method, was very disappointed with this problem.