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→Finding Half Life from a Graph
|[[File:HalfLifeGraph2.png|center|300px]]
|[[File:HalfLifeGraph3.png|center|300px]]
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| style="height:20px; width:300px; text-align:center;" |There is 100% of the [[isotope]] at the beginning. Draw a horizontal line from 50% to the curve. Draw a vertical line down from the curve to indicate the '''half life'''.
| style="height:20px; width:300px; text-align:center;" |The [[Count Rate|count rate]] began at 70,000Bq. Draw a horizontal line from 35,000 (half the initial count rate) to the curve. Draw a vertical line down from the curve to indicate the '''half life'''.
|-
|[[File:HalfLifeGraph2b.png|center|300px]]
|[[File:HalfLifeGraph3b.png|center|300px]]
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| style="height:20px; width:300px; text-align:center;" |There is 100% of the [[isotope]] at the beginning. Draw a horizontal line from 50% to the curve. Draw a vertical line down from the curve to indicate the '''half life'''.
'''Half Life''' = 4 [[minute]]s
| style="height:20px; width:300px; text-align:center;" |The [[Count Rate|count rate]] began at 70,000Bq. Draw a horizontal line from 35,000 (half the initial count rate) to the curve. Draw a vertical line down from the curve to indicate the '''half life'''.
'''Half Life''' = 6 [[hour]]s
|}