A spontaneous process means that it is not possible to say which particular nucleus will decay next ... not drop to zero completely. The half-life of radioactive carbon-14 is 5,730 years.

Radioactive ... nucleus will decay, but they can use statistical methods to tell when half the unstable nuclei in a sample will have decayed. This is called the half-life. Key fact Half-life ...

When unstable nuclei undergo change they give off radiation. Atoms which have unstable nuclei are radioactive and are called radioisotopes or radionuclides. The change that an unstable nucleus ...

In this lesson, students will simulate the randomness of decay in radioactive atoms and visualize the half-life of a sample radioactive element. This lesson can be completed in two (2) 45-minute class ...

A radioactive isotope's nucleus is unstable and spontaneously decays, giving off radiation and changing into a different isotope. The rate at which nuclei decay is constant. Half-life describes ...

The radioactive decay is expressed in units called becquerels. One becquerel equals one disintegration per second. The radionuclides decay at a characteristic rate that remains constant regardless of ...

This rate of decay is constant for a given isotope, and the time it takes for one-half of a particular isotope to decay is its radioactive half-life. For example, about 1.5 percent of a quantity ...

The radioactive decay is expressed in units called becquerels. One becquerel equals one disintegration per second. The radionuclides decay at a characteristic rate that remains constant regardless of ...