Why are there atomic clocks but no nuclear clocks? After all, an atom's nucleus is typically surrounded by many electrons, so ...

A report about the decay and half-life of different radioactive elements. It is impossible to predict when any one atom will decay but by looking at a number of atoms an average rate of decay can ...

Try to keep the same number of neutrons and protons as you build your atom. If the imbalance is too great, radioactive decay will occur. Up to two electrons may exist in the atom's first shell.

One of these decay products is the previously discovered ... RHIC, often referred to as an “atom smasher,” serves as a powerful tool for recreating the conditions of the early universe.