Radioactive Isotope

Yohannes Bekele
Period 4th
1-24-11

How the activity of a Radioactive Isotope Changes with Time

I. offer:
Since atoms or their nuclei cannot be seen by the eye, it may be utile to model radioactive decay. Using the model, examine how radioactive decreases with time.

II. existent:
In this experiment the following materials argon used; nose candy popcorn kernels, Plastic Petri dish, 5cm reave of masking videotape and a graph paper.

III. Procedure:
Get issue a saddlery of paper and copy the table, notice that the trials are going to be more than five. On a flat surface, count out hundred kernels of popcorn and place back the rest. go in the 5cm strip of tape on the bottom half edge of the Petri dish. Place the 100 kernels in the bottom half of the Petri dish. Notice that the 100 popcorn kernels are to represent 100 nuclei of atoms. Put the lid on the Petri dish and shake it around, make sure not to shake fast or hard. Put the dish on the flat surface and count out the popcorn kernels that are pointing to the 5cm masking tape. As you count pee-pee them out, but be sure not to count one twice or count wrong. Write down how many popcorn kernels were pointing to the tape ( decayed nuclei) and the number of (un decayed) kernels on the table. Repeat the shaking and counting until at that place is no more popcorn kernels left in the Petri dish.



In the process of the shaking, if no popcorn kernel is to be pointing to the 5cm tape it is need to record that at that place were no popcorn kernels removed.

VI. Data and Calculation


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To calculate the next remaining Nuclei take the last remaining Nuclei and subtract the removed Nuclei from it. Repeat that until there is no kernel left.

**** Graph can be be to the back of the packet.****

V. Result and Analysis
When the time equal zero there were 100 popcorn kernels in the Petri dish. As the time went on the number of kernels started to decrease. The...If you want to get a full essay, couch it on our website: Orderessay



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