How does a carbon-14 atom differ from a carbon -12 atom? A. Carbon -14 has fewer protons than carbon -12 B. Carbon-14 has more neutrons than carbon -12 C. Carbon -14 has fewer neutrons than carbon -12 D. Carbon -14 has more protons than carbon -12

The correct answer is B. Carbon-14 has more neutrons than carbon-12.<br /><br />Carbon-14 and carbon-12 are both isotopes of the element carbon, which means they have the same number of protons but different numbers of neutrons.<br /><br />The atomic number of carbon is 6, which means it has 6 protons. The difference between carbon-14 and carbon-12 is the number of neutrons in the nucleus.<br /><br />Carbon-12 has 6 neutrons, while carbon-14 has 8 neutrons. Therefore, carbon-14 has more neutrons than carbon-12.<br /><br />The other options are incorrect:<br /><br />A. Carbon-14 does not have fewer protons than carbon-12. Both isotopes have 6 protons.<br /><br />C. Carbon-14 does not have fewer neutrons than carbon-12. Carbon-14 has more neutrons than carbon-12.<br /><br />D. Carbon-14 does not have more protons than carbon-12. Both isotopes have the same number of protons.<br /><br />In summary, the key difference between carbon-14 and carbon-12 is the number of neutrons in the nucleus, with carbon-14 having more neutrons than carbon-12.