- N Alpha Ds N To Its N E Of Remely M C Nuculeus Half Life The Half Life Of A Radioactive Element Is That Period In Which 1 (169.76 KiB) Viewed 24 times
n alpha ds n to its n e of: remely m,c nuculeus Half life The half-life of a radioactive element is that period in which half of the atoms decay. Half-life of a radioactive element is 0.693 11/2 2 Where A is the decay constant. Average life: 1 11/2 tav λ 0.693 Range of a particle: An a-particle travels a well defined distance in a medium before coming to rest. This distance is called the range of the particle. FLUORESCENCE Fluorescence is the property of absorbing radiant energy of high frequency and re-emitting energy of low frequency in the visible region of electromagnetic spectrum. DRILL 1. Out of 10 mg of a radio active sample, 1.25 mg remains undecayed after 6 hours. The mean life of the sample in hours is A. 0.693 B. 2/0.693 C. 4/0.693 D. 0.693/4 B = = ANSW 1 B RA Nucle henc emp det de a