Which property of isotopes is important in dating
Isotopes: The number of neutrons in the nucleus of an atom of a specific element can vary.
For example, carbon, which normally has 6 protons and 6 neutrons, also has versions that have 7 neutrons or 8 neutrons in the nucleus.
A half-life is the amount of time it takes for half of a radioactive substance to decay.
For example, carbon-14 decays be emitting a beta particle to become nitrogen. In other words, after 5730 years, half of the initial radioactive carbon in a sample will be left.
The reason that the radioactive decay of isotopes can be used to date items is because radioactive decay occurs at very predictable rates. For example, if you talk about the speed of a car, you refer to its speed in miles per hour.
In radioactive decay, speeds are talked about in terms of half-lives.
This affects physical properties such as densities and temperatures of changes of state e.g. There are two common isotopes of the element chlorine. Have you noticed that some versions of the Periodic Table state the mass numbers of the elements as whole numbers only, whereas other versions of the periodic table state mass numbers mean that there are parts of protons or neutrons present in the atom.The particles or energy, themselves are called radiation.