Half-life-alyx-trnt.rar -

: Draw a horizontal line from this half-value to the curve, then a vertical line down to the time axis (x-axis).

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 Half-Life-Alyx-TRNT.rar

) of a radioactive isotope is the time required for half of the unstable nuclei in a sample to undergo radioactive decay. : : Draw a horizontal line from this half-value

: The distance from zero to that point on the time axis is one half-life. Examples of Isotopes Examples of Isotopes : Activity is measured in

: 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:

: You cannot predict when a single nucleus will decay, but you can predict the behavior of a large sample.