Carbon-14 is a naturally-occuring, stable isotope that is commonly used is scientific studies as a tracer and to date artifacts. using the periodic table, predict the number of electrons, neutrons, and protons in carbon-14. a) carbon-14 contains 7 electrons, 7 neutrons, and 7 protons. b) carbon-14 contains 6 electrons, 8 neutrons, and 6 protons. c) carbon-14 contains 6 electrons, 8 neutrons, and 7 protons. d) carbon-14 contains 7 electrons, 8 neutrons, and 9 protons.