Unstable isotopes break down, emitting radiation. Some of these unstable isotopes play a key role in nuclear medicine, a medical specialty that uses radioactive substances to treat, study or ...

Many isotopes are very unstable and can exist in that form for only a very short time; others can last billions of years. Gold has 40 known isotopes, and another 20 not yet seen but theorized by ...

Unstable isotopes decay into other isotopes or elements through radioactive decay. Since the rate of decay is known for unstable isotopes, we can use the amounts present in a sample to determine ages.

Those unstable isotopes are expected to ultimately decay into stable elements, like gold, that are lighter than superheavy elements but still heavier than iron.

South Africa, home to the world’s largest rhino population, had lost over 10,000 rhinos to poaching over the last decade.

A fusion energy startup claims to have found a way to turn mercury into gold. As the Financial Times reports, San Francisco-based Marathon Fusion says that the same process that could one day ...