### HALF LIFE PROBLEMS Mrs N Nelson S Science Website

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**HALF-LIFE PROBLEMS**Name Block 1. An isotope of cesium (cesium-137) has a

**half-life**of 30 years. If 1,0 g of cesium-137 disintegrates over a period of 90 years, how many g of cesium-137 would remain? A We) r" 2. Actinium-226 has a

**half-life**of 29 hours. If 100 mg of actinium-226 disintegrates over a

### Half Life Practice Worksheet Weebly

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### Half Life Data Worksheet US EPA

https://www.epa.gov/sites/default/files/2018-12/documents/half-life-data-worksheet-ra5.pdf

**half‐life**demonstration as directed by your teacher. 2. Calculate thenumber of radioactive atoms remaining after each half‐life. Write the number of atoms in the “Number of RadioactiveAtoms” column. Plot the number of radioactive atoms on the graph provided.

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### 10 Half Life Problems And Answers Examples Edutized

https://edutized.com/chemistry/10-half-life-problems-and-answers-examples

**half-life**of this isotope. Solution From N t = 1 2 t t 1 / 2 N o we rearrange this equation to take the form t 1 / 2 = t log 2 log N o N t = 5 log 2 log 150 120. 2 = 15.6482 days 2. Iodine-131 has a

**half-life**of 8 days.

### HALF LIFE PROBLEMS

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### Half Life Calculations

https://www.thomas.k12.ga.us/userfiles/538/Classes/1633/halflife%20worksheet%20practice%20answers-0.pdf

**half-life**of 3.053 minutes. How long will it take for 120.0g to decay to 7.5g? 5. The

**half-life**of halfnium-156 is 0.025 seconds. How long will it take a 560g sample to decay to 140g? 6. Chromium-48 has a

**half-life**of 21.6 hours. How long will it take 360.0g of chromium-48 to decay to 11.25g? 7.

### Half Life Practice Problems With Key

https://www.warrencountyschools.org/userfiles/1667/Classes/14319/half-life%20practice%20problems%20with%20key.pdf?id=585753

**Half-life**Practice

**Worksheet**1. Sodium-24 has a

**half-life**of 15 hours. Ho much sodium- will remain in an 18.0 g sample after 60 hours? 30 2. After 42 days a 2.0 g sa osp orus-32 contains on isotope. What is the half4jfe of phosphorus-32? 3. Polonium-214 has a relatively short

**half-life**of 164 seconds. How many

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