ty due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be activity in a similar-sized sample of fresh wood is measured to be 7.5 × 10° Bq. Calculate the age of the artifact. Round your answer to 2

VISUALIZATION Modes of Radioactivve Decay 140 130 120 110 100 90 80 70 -- 1 60 50 - Stable - Radioactive 40 30 20 10 50 Number of protons (Z) 10 20 30 40 60 70 80 90 100 Finally, consider alpha decay. Alpha decay does not move perpendicular to the region of stability, as do the other forms of radioactivity studied. E→如+R Instead of considering the n/p ratio, consider overall nuclear mass. Is alpha decay expected to occur more frequently in very heavy nuclei or in very light nuclel? In which direction would a nucleus move on this chart if it were to occur? O up to the left up to the right very heavy down to the left O down to the right very light Number of neubons (0)

Suppose the amount of a certain radioactive substance in a sample decays from 5.30mg to 1.40mg over a period of 18.6 days. Calculate the half life of the substance. Round your answer to 2 significant digits.

When any radioactive dating method is used, experimental error in the measurement of the sample's activity leads to error in the estimated age. In an application of the radiocarbon dating technique to certain fossils, an activity of 0.130 Bq per gram of carbon is measured to within an accuracy of 14.0 percent. Find (a) the age of the fossils and (b) the maximum error (both in years) in the value obtained. Assume that there is no error in the 5730-year half-life of 6C¹4 nor in the value of 0.23 Bq per gram of carbon in a living organism. (a) Number i (b) Number i Units Units