Radioactive dating uses the decay rates of radioactive substances to measure absolute ages of rocks, minerals and carbon-based substances, according to How Stuff Works. Scientists know how quickly radioactive isotopes de... More »

Carbon-14 undergoes a beta-minus decay. Carbon-14, which is one of the carbon radioisotopes with eight neutrons instead of the normal six, emits weak beta radiation. More »

Relative dating and radiometric dating are used to determine age of fossils and geologic features, but with different methods. Relative dating uses observation of location within rock layers, while radiometric dating use... More »

Radioactive decay is the process by which a radioactive atom emits particles and energy to reach a more stable configuration. Atoms may emit alpha or beta particles from the nucleus or may spontaneously split into differ... More »

Radioactive decay problems are solved by using a formula for exponential decay where the final amount of radioactive material equals the initial amount times e to the power of k times time. Simple substitution of the kno... More »

Humans use rocks for a wide variety of purposes, including construction and as a source of valuable minerals located inside the rocks. Additionally, humans use rocks for decoration, recreation and thermal purposes. Human... More »

Radioactive isotopes are used in many ways, including medical purposes, tracing, X-rays and equipment sterilization. If not disposed of properly, radioactive isotopes may cause damage to the environment. More »