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OpenStudy (anonymous):
Figure 14-1 shows the decay of a sample of neptunium-238 over a period of 10 days. What is the half-life of neptunium-238?
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OpenStudy (anonymous):
OpenStudy (blues):
The half life is the time at which half the sample has decayed and half of it is still around. So you need to look for the 1/2 on the Y axis and see what value of time it corresponds to on the independent axis. That said, this is not a biology question. It (and those like it) should probably be posted in the physics or math group instead. OK?
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