Examlex
This measure indicates how much error may be on a test based on a score's distance from the mean.
Radioactive Decay
The process by which an unstable atomic nucleus loses energy by emitting radiation.
Half-life
The time required for half of the atoms in a radioactive substance to undergo decay, a characteristic constant for each radioactive isotope.
Half-life
The time required for half the atoms of a radioactive substance to decay into a stable form.
Cesium-137
A radioactive isotope of cesium with a half-life of about 30.17 years, commonly used in medical applications and industrial gauges.
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