Using Excel or a similar program plot the following data from a radiation detect

Question

Using Excel or a similar program plot the following data from a radiation detector. Plot time on the x-axis and counting rate on the y-axis. Be sure to label each axis with the name and unit of the quantity being plotted. Also title the plot. Because you are plotting only one set of data, there is no need for a legend, so remove the legend if appears automatically. Time (s) Counting rate (counts/s) 0 200 1000 182 2000 162 3000 144 4000 131 5000 118 6000 106 7000 95 8000 86 9000 77 10000 69 From the data and your plot, deduce the half-life of the isotope.

Explanation / Answer

b) from data we check wheteher zero order kinetics is obeyed , k1 = (1/t)(a-(a-x)),

k1 = (200-182)/1000 = 0.018,

k2 = ( 200-162)/2000 = 0.019 , hence k is nearly constant , hence zero order obeyed,

half life t1/2 = a/2k = 200/(2 x0.018) = 5555.5 seconds

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