What is meant by a half-life of a substance?
half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive
How do you find the half-life of a substance?
Half Life Formula
- t12 t 1 2 half-life.
- Given decay constant u03bb 0.84. The half life formula can be used to find the half life of the substance. t12 t 1 2 0.693/u03bb
- Solution: Given half life of the substance is t12 t 1 2 0.04. The half life formula can be used to find the half life of the substance.
- t12 t 1 2 0.693/u03bb
What does the half-life of a substance depend on?
EXPLANATION: The half-life depends on the temperature and pressure in general first-order reaction but in the case of the radioactivity, there is a negligible change in the half-life by changing the temperature and pressure.