Final answer:
The difference between C-12 and C-14 isotopes lies in the number of neutrons; C-14 has 2 more neutrons than C-12. Carbon-12 has six protons and six neutrons, while Carbon-13 has six protons and seven neutrons.
Step-by-step explanation:
The explanation for the difference between the two isotopes of carbon, C-12 and C-14, can be found in their neutron counts. Isotopes are forms of an element that have the same number of protons but different numbers of neutrons. C-14 contains 2 more neutrons than does C-12, not more protons or electrons, making option c the correct answer for the first question. Specifically, carbon-12 (C-12) contains six protons and six neutrons, while carbon-13 (C-13) contains six protons and seven neutrons, making option a the correct answer to the question of how many neutrons carbon-12 and carbon-13 have, respectively.