Carbon dating laboratories
In this type of device, Carbon isotopes are ionized so they can be influenced by a strong magnetic field.
Some other radioactive isotopes of other elements have very short half-lives such as in minutes or even microseconds.
Note that it is totally unpredictable when a specific atom will decay.
However, in any sample that might be studied or dated, there are very large numbers of atoms.
Sedimentary rocks are never dated using radiometric dating, though fossils can sometimes be dated.
The rocks brought back to Earth from the Moon were dated with the Uranium/Lead technique and other techniques that used a variety of other radioactive elements.