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After 1.78 years, 1.990 g of a radioisotope remains from

After 1.78 years, 1.990 g of a radioisotope remains from a sample that had an original mass of 2.000 g.Calculate the half-life
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2. asked by Rachel
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A certain amount of radioisotope (986.8 x 10-9 kg) is used to make the dial of a watch glow in the dark. If the half-life of
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2. asked by eric
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A radioisotope has a half-life of 4 days. How much of a 20-gram sample of this radioisotope remains at the end of each time
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2. asked by Stephanie
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Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who
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Determine the total time that must elapse until only ¼ of an original sample of the radioisotope Rn-222 remains unchanged.
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2. asked by Caio
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Assume a substance has a half-life of 11 years and the initialamount is 144 grams. How much remains at the end of 5 years? How
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2. asked by nick
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Can someone link me videos and sites that can teach me the formula to solve these? Or try to help me understand how to solve
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2. asked by Samantha
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Which of the following is true concerning gamma radiation?A. The mass number of the radioisotope decreases by four. B. The
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2. asked by Cherry
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If only 50% of the original amount of a radioisotope remains,half the time has gone by after twice that time there will be
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2. asked by cherry
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a radioisotope is called a tracer when it is used to1 kill bacteria 2 kill cancerous cells determine the age of animal skeletal
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2. asked by Jazmin
3. 1,296 views