JAMB - Chemistry (2018 - No. 56)
The knowledge of half-life can be used to
Create an element
Detect an element
to combine elements
Irradiate an element
คำอธิบาย
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 material to decrease by one-half