Graph of count rate against time It is possible to find out the half-life of a radioactive substance from a graph of the count rate against time. The graph shows the decay curve for a radioactive ...

Beta decay causes the atomic number of the nucleus to increase by one while the mass number remains the same. Gamma ray emission causes no change in the number of particles in the nucleus ...

There are three general approaches that allow scientists ... Some commonly used dating methods are summarized in Table 1. The rate of decay for many radioactive isotopes has been measured and ...

Certain isotopes are unstable and undergo a process of radioactive decay, slowly and steadily transforming, molecule by molecule, into a different isotope. This rate of decay is constant for a ...

Of the four known fundamental forces of nature, the weak nuclear force is the one ... Protons and neutrons are both composites of three quarks of two types, or “flavours”, up and down.