Half life problems class 1

Solve half-life problems and understand radioactive decay!

The half-life of radon-222 is 3.8 days. How many half lives occur in 15.2 days? 1 2 3 4 The half-life of radon-222 is 3.8 days. How much of a 120 g sample is left after 15.2 days? Using the information above and the answer to the previous problem, fill in the table to find the answer. Fill in only the number for the grams. Use only as many rows as are needed to solve the problem. Number of half lives Amount (g) 0 120 1 60 2 30 3 15 4 7.5 The half-life of radon-222 is 3.8 days. How much of a 120 g sample is left after 15.2 days? Use the information in the table you just filled in. 1920 g 30 g 15 g 7.5 g The half-life of carbon-14 is 5730 years. , how many half-lives occur in 17190 years? 1 2 3 4 The half-life of carbon-14 is 5730 years. If a sample contains 80 g originally, how much is left after 17190 years? Using the information above and the answer to the previous problem, fill in the table to find the answer. Fill in only the number for the grams. Use only as many rows as are needed to solve the problem. Number of half-lives amount (g) 0 80 1 40 2 20 3 10 The half-life of carbon-14 is 5730 years. If a sample contains 80 g originally, how much is left after 17190 years? Use the information from the chart you just filled in. 480 g 26.7 g 10 g 5 g