Our planet is far older than people had thought! Students can understand the mechanism of radioactive half-life and how it helps determine age by experimenting with pennies, dice, and sugar cubes ...

Key fact Half-life is the time it takes for the activity of the source to fall to half its original value. The illustration below shows how a radioactive sample is decaying over time. From the ...

(Courtesy: HZDR / blrck.de) Something extraordinary happened on Earth around 10 million years ago, and whatever it was, it left behind a “signature” of radioactive beryllium ... Because beryllium-10 ...

Radioactive isotopes are typically used by ... such as cosmogenic beryllium-10." The isotope's half-life is a whopping 1.4 million years, and breaks down into boron, allowing scientists to look ...

Oak Ridge National Laboratory discovered a rare radioactive element called promethium. Nearly 80 years later, scientists have ...

Thorium is the most abundant radioactive material on Earth, but it eventually turns into lead. The half life, however, is just over 14 billion years, so your lenses probably won’t turn to lead ...

With a half-life of roughly 30 years, the source is expected to remain meaningfully radioactive for approximately 300 years or so. As the decades pass, though, it becomes less and less radioactive ...

It also produces and consumes tritium within the plant in a closed circuit. Tritium is radioactive (a beta emitter) but its half life is short. It is only used in low amounts so, unlike long-lived ...

the material would present an unreasonable public health threat from radon gas emissions that would continue for generations given their radioactive 1,600-year half-life. In addition to radionuclides, ...

Diagnosis of chronic sialadenitis can readily be accomplished when the patient's history of having received radioactive iodine ... it only has a 6-hour half-life and does not produce any ...

Radioactive Cesium-137 was detected between ... The isotope possesses a lengthy physical half-life of 30 years and exhibits high water solubility. If released at elevated temperatures, it can ...