How do isotopes of carbon differ from one another?
They differ in the number of neutrons in the nucleus.
Isotopes are atoms that have the same number of protons but different numbers of neutrons.
Carbon has 15 known isotopes, ranging from carbon-8 to carbon-22.
Only carbon-12 and carbon-13 are stable. Carbon-14 is the longest-lived radioactive isotope.
The number of neutrons =
The symbol for carbon-12 is
The symbol for carbon-13 is
The symbol for carbon-14 is
In the same way, a carbon-8 atom has 2 neutrons, and a carbon-22 atom has 16 neutrons.