Of course, one must select geologic materials that contain elements with long half-lives—i.e., those for which some parent atoms would remain.
isotope is converted into another specific atom or isotope at a constant and known rate.
Most elements exist in different atomic forms that are identical in their chemical properties but differ in the number of neutral particles—i.e., neutrons—in the nucleus.
In other words, each radioisotope has its own Stated in words, this equation says that the rate at which a certain radioisotope disintegrates depends not only on how many atoms of that isotope are present but also on an intrinsic property of that isotope represented by λ, the so-called decay constant.
Values of λ vary widely—from 10) rather than through the decay constant λ.
The results show that there is no known process that can alter the rate of radioactive decay.
By way of explanation it can be noted that since the cause of the process lies deep within the atomic nucleus, external forces such as extreme heat and pressure have no effect.
Half-life is defined as the time period that must elapse in order to halve the initial number of radioactive atoms.
The half-life and the decay constant are inversely proportional because rapidly decaying radioisotopes have a high decay constant but a short half-life.
The particles given off during the decay process are part of a profound fundamental change in the nucleus.