Question #65db0

1 Answer
Jun 29, 2017

It is the time t_"1/2" necessary for a radioactive mass to lose half its mass.

Explanation:

The decay is an exponential function

M_(t) = M_(0) [ 1/2 ]^( t // t_"1/2" )

M_(0) = "initial mass at" t=0

Note if t = t_"1/2" then M_(t_"1/2") = 1/2 "initial mass"