Half life of radioactive isotopes docx sh jir open new. If an 800 0 g sample of technetium 99 decays to 100 0 g of technetium 99 in 639 000 y what is its.
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5 6 if 250 mg of a radioactive material decays to 200 mg in 48 hours what is the 1 2 life of the material.
Half life worksheet. This worksheet allows students to practice solving all types of problems involving half life. What is the half life of a 100 0 g sample of nitrogen 16 that decays to 12 5 g of nitrogen 16 in 21 6 s. After 42 days a 2 0 g sample of phosphorus 32 contains only 0 25 g of the isotope.
What percentage of the sample remains after 250 years. While this worksheet was designed for an honors level chemistry class it can easily be modified for lower ability students. Half life of carbon 14 5730 y your turn to think 1.
1 2 3 0 125 the amount remaining after 3 half lives 10 0 g x 0 125 1 25 g remain 10 0 g 1 25 g 8 75 g have decayed note that the length of the half life played no role in this calculation. How much sodium 24 will remain in an 18 0 g sample after 60 hours. Jim deposits 1000 into a bank that pays 8 annual interest compounded continuously.
Some of the worksheets for this concept are half life work atoms half life questions and answers half life of paper mms pennies puzzle pieces licorice half life ws radioactive decay half life work half life practice work. Students are then taught how to calculate half life from a graph using examples. All isotopes of technetium are radioactive but they have widely varying half lives.
How many grams of a 10 0 gram sample would have decayed after exactly three half lives. When the living thing dies the carbon 14 begins to decay at a steady rate with a half life of 5 730 years. A worksheet is then completed taken from another tes author.
Half life with answer displaying top 8 worksheets found for this concept. Sodium 24 has a half life of 15 hours. Students then complete a simple practical to model half life.
Half life of radioactive isotopes name. 4 a radioactive element has a half life of 1000 years. Some of the worksheets for this concept are half life work half life ws half life graph work name date class half life work radioactive decay half life work half life practice work.
They roll small cubes or dice and take the cubes that land silver side up or on the number 1 out of play. What is the half life of phosphorus 32. Some of the worksheets for this concept are half life graph work name date class name per life and radioactive decay half life practice work atoms half life questions and answers calculating the half life of twizzlers and mmium half life of paper mms pennies puzzle pieces licorice number of undecayed mms.
Half life displaying top 8 worksheets found for this concept. A complete answer key is provided at the end. Carbon 14 is a radioactive isotope found in small amounts in all living things.
Half life graphing displaying top 8 worksheets found for this concept. Polonium 214 has a relatively short half life of 164 seconds. Edit your docs with microsoft word online.
Os 182 has a half life of 21 5 hours.
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