Answer:
the answer is 10 years
Explanation:
An atom may contain an unstable nucleus that spontaneously transforms into a more stable form by emitting particles and energy. Half-life is a measure of the time needed for one-half of the atomic nuclei of a given radioactive substance to decay in its radioactivity. This time is a constant and can be estimated as an exponential unit which is dependent on the type of radioactive isotope. For example, Carbon-14 (C14) is a radioactive isotope of carbon that has a half-life of 5730 years.
