Carbon dating exam questions

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I had something in a chemistry exam yesterday about carbon dating, and it asked why fossil fuels can't be dated. Now I was first going to write it's because they're so old Turns out that was one of the acceptable answers. What I said was; at the time fossil fuels were formed millions of years ago , there was no carbon in the atmosphere therefore they never came into contact with it and can't be dated.
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Radiocarbon dating

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AP Chemistry Practice Test

When an unstable nucleus gives out an alpha or beta particle, the nucleus turns into the nucleus of a new element. This process is called radioactive decay. Although radioactive decay is a random process, statistically, over a time called the half-life , half of the parent radioactive nuclei will have decayed. Working out the half-life allows us to calculate when a radioactive element will become stable. Look at the diagram. In this decay model, the green squares represent the parent unstable nuclei.
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Carbon Dating

This passage is about the use of lichenometry in studying earthquakes. This section has paragraph summaries and an analysis of the passage, links to the explanations for the questions are below. This is a detail-heavy passage. You should retain a few key points as well.
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This is not a teaching powerpoint. This powerpoint is suitable for Advanced Placement Biology classes that need a quick review over a particular topic. Several months before the AP Biology exam, I begin to run through these short powerpoints to start my students on the road to reviewing for the exam in May.
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