Thrush occurs in children and adults when conditions permit too much growth of a fungus called candida in your mouth. A small amount of this fungus normally lives in your mouth. It is most often kept in check by your immune system and other germs that also live in your mouth. When your immune system is weak or when normal bacteria die, too much of the fungus can grow. You are more likely to get thrush if: You are in poor health.
The rate at which a radioactive isotope decays is measured in half-life. The term half-life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate. Half-lives for various radioisotopes can range from a few microseconds to billions of years. See the table below for a list of radioisotopes and each of unique their half-lives. Radioisotope.
Over time, as the number of unstable atoms decreases, the material becomes less radioactive. This time is measured by the âhalf lifeâ of different radioactive elements. This is the amount of time it takes for half of the atoms in a given sample to decay and give off radiation. For example, carbon-14 has a half-life of 5730 years, so after that amount of time, a quantity of 100 atoms of C-14 would have turned into 50 C-14 atoms and 50 Nitrogen-14 atoms.