To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C and 14N, because over time the 14C-which originated in the atmosphere-breaks down into 14N through a process known as beta decay. What net change occurred for this to happen?
A. The 14C gained a proton.
B. The 14C gained an electron.
C. The 14C lost an electron.
D. The 14C gained a neutron.
E. The 14C lost a proton.
Answer: A
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