1. They are isotopes of carbon: This means they both have the same number of protons (6) but different numbers of neutrons.
* Carbon-12: Has 6 protons and 6 neutrons. This is the most common and stable isotope of carbon.
* Carbon-14: Has 6 protons and 8 neutrons. This is a radioactive isotope of carbon.
2. They have different atomic masses:
* Carbon-12: Has an atomic mass of 12 (6 protons + 6 neutrons)
* Carbon-14: Has an atomic mass of 14 (6 protons + 8 neutrons)
3. Carbon-14 is radioactive:
* Carbon-14 decays over time through a process called beta decay, releasing a beta particle (electron) and transforming into nitrogen-14.
* The half-life of carbon-14 is 5,730 years, meaning that half of a sample of carbon-14 will decay into nitrogen-14 in that amount of time.
4. Carbon-14 can be used for radiocarbon dating:
* Due to its radioactive nature and known half-life, carbon-14 can be used to date organic materials up to about 50,000 years old.
* Scientists measure the ratio of carbon-14 to carbon-12 in a sample to determine its age.
5. Carbon-12 is the standard for atomic mass:
* Carbon-12 is used as the standard for defining the atomic mass unit (amu), which is equal to 1/12th the mass of a carbon-12 atom.
By studying the differences between carbon-12 and carbon-14, scientists can gain insights into:
* The structure of the atom: How the number of neutrons affects atomic mass and stability.
* Radioactive decay: The process of how unstable isotopes transform into other elements.
* The age of ancient materials: Using carbon-14 dating to understand the history of life on Earth.
