Note:  You will need the table of atomic weights inside the back cover of the Physical Science 6e textbook.

1		Give the number of protons and the number of neutrons in the nucleus of each of the following isotopes: (a) aluminum-25 (b) technetium-95 (c) tin-120 (d) mercury-200
2		Write the nuclear symbols for each of the nuclei in exercise 1.
3		Predict if the nuclei in exercise 1 are radioactive or stable, giving your reasoning behind each prediction.
4		Write a nuclear equation for the beta emission decay of each of the following: <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072509783/121105/chap13parexb_q4.jpg','popWin', 'width=144,height=241,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (5.0K)</a>
5		Write a nuclear equation for each of the following alpha emission decay reactions: <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072509783/121105/chap13parexb_q5.jpg','popWin', 'width=154,height=241,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (6.0K)</a>
6		If the half-life of cesium-137 is 30 years, approximately how much time will be required to reduce a 1 kg sample to about 1 g?