Nt=N0(12)tT1/2cap N sub t equals cap N sub 0 open paren one-half close paren raised to the the fraction with numerator t and denominator cap T sub 1 / 2 end-sub end-fraction power Determining Half-Life from a Graph

: Activity is measured in Becquerels (Bq) , representing one decay per second. The Mathematical Formula The relationship between the decay constant ( ) and the half-life is defined by the following equation:

: Half-life is constant for a specific isotope and cannot be changed by physical or chemical means.