Question

how is carbon - 12 different from carbon - 14? they have a different number of protons they have a different number of electrons they have a different number of neutrons

Explanation:

Carbon - 12 and carbon - 14 are isotopes of carbon. Isotopes of an element have the same number of protons (and in neutral atoms, the same number of electrons). The difference between isotopes lies in the number of neutrons. Carbon - 12 has 6 neutrons (mass number 12, atomic number 6 so 12 - 6 = 6 neutrons) and carbon - 14 has 8 neutrons (mass number 14, atomic number 6 so 14 - 6 = 8 neutrons).

Answer:

They have a different number of neutrons