Radioactive dating gcse questions
When atoms decay, they emit three types of radiation, alpha, beta and gamma.
The alpha and beta radiation consist of actual matter that shoots off the atom, while gamma rays are electromagnetic waves.
The purpose of this is to test the thickness of the sheets.
Because the beta radiation can only partially penetrate aluminium foil, if the readings on the Geiger counter are too low, it means that the aluminium foil is too thick and that the presses are adjusted to make the sheets thinner.
The radioactive isotope measured in carbon dating is carbon-14, which is produced when cosmic rays act on nitrogen in the upper atmosphere.
The first type of radiation, Alpha, consists of two neutrons and two protons bound together to the nucleus of a Helium atom.All living cells take up carbon-14, whether from photosynthesis or eating other living cells.When a living cell dies, it stops taking in carbon-14, because it stops photosynthesising or eating, and then gradually over time the carbon-14 decays and is no longer found in the tissue. The half-life of carbon-14 (the time in which it takes from the radiation emitted from the source to be halved) works out to be 5,730 years.Likewise, if the Geiger reading is too high, the presses are adjusted to make the sheets thicker.Sidenote: The blue glow produced in some nuclear power plant pools is due to high speed beta particles moving faster than that of light traveling through water.
Beta radiation consists of an electron and is characterized by its high energy and speed.