The nuclei of certain atoms are stable and under ordinary circumstances, stable nuclei do not undergo change. The nuclei of other atoms are unstable. These nuclei undergo change spontaneously, that is ...

As a result of energy conservation, only 195 of the almost 10,000 nuclei predicted to exist and the 3,300 currently known are stable against spontaneous decay. Atmospheric radiation is given off by ...

But in the early 1930s, scientists discovered that some atomic nuclei – the center part of atoms, which make up all matter – ...

Scientists have just broken a 100-year-old chemistry rule and synthesized a type of 3D, unstable molecule called an ...

And those atoms are surrounded by electrons. Now, when an atom has enough electrons, it's called a stable atom, and when it's missing some electrons, it's unstable. Here's the important part ...

The innovative structures could help address key challenges in drug design by serving as more stable alternatives ... However, these structures can be unstable under physiological conditions ...

The radiation emitted from unstable nuclei is called ionising radiation because as it passes through matter it can dislodge outer electrons from atoms causing them to become ions. An unstable ...