# Half Life Worksheet #3

After 3 half lives how much of a 400 gram sample of radioactive uranium remains. The half life of chromium 51 is 28 days.

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### Iodine 131 has a half life of 8 days.

Half life worksheet #3. Os 182 has a half life of 21 5 hours. After one half life. Fluorine 21 has a half life of approximately 5 seconds.

Old aqa gcse resource on half life. Powerpoint and worksheets used are attached. 12 5 of a radioactive sample are left.

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. Radioactive decay name hr honors algebra 2 assignment. Write down the equation relating half life the number of half lives and the decay time and rearrange it to solve for half life.

Questions from physics gcse oxford university press book. On plant surfaces the half life of permethrin ranges from 1 3 weeks depending on the plant species. Half life concepts worksheet 1.

In the si system the becquerel bq is the unit of activity which is equal to one. In the water column the half life of permethrin is 19 27 hours. If it sticks to sediment it can last over a year.

Half life practice worksheet name period date l. How many half lives have passed. How many half lives have passed in 10 52 years.

A 50 gram sample of a radioisotope undergoes 2 half lives. What fraction of the original sample would remain at the end of 32 days. One curie equals 37 000 000 000 37 billion disintegrations per second.

The half life of cobalt 60 is 5 26 years. How many grams would remain at the end. Name the element on table n that has the shortest half life that undergoes alpha decay.

After three half lives what fraction of the original sample would remain. In soil the half life of permethrin is about 40 days ranging from 11 113 days. Calculate how many half lives have passed during the decay of the 100 0 g sample.

After 4 half lives 10 grams of uranium. 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. What fraction of the original nuclei would remain after 1 minute.

Preview and details files included 3 pptx 2 mb. Named after nobel prize recipient marie curie the curie ci is the unit used to describe the rate of decay or activity of a radioactive material in disintegrations per second. Element half life polonium215 0 0018 seconds oxygen15 2 minutes sodium24 15 hours iodine131 8 07 days cobalt60 5 26 years radium226 1600 years carbon14 5600 years potassium40 1 3 billion years uranium238 4 5 billion years radioactive isotopes atoms with unstable nuclei decay over time.

Activity half life half value layers activity. Half life worksheet extra practice. Half life with answer displaying top 8 worksheets found for this concept.

How many grams of a 10 0 gram sample would have decayed after exactly three half lives. After two half lives of sample two half lives have passed.

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Half Life Problems 2

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