Half Life Practice Problems
Quiz by Wanda Rice
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5 questions
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- Q1What is the half-life of a 50 g sample of nitrogen-16 that decays to 6.25 g in 21.6 seconds?64.8 seconds21.6 seconds3 seconds7. 2 seconds30s
- Q2If a 200 g sample of technetium-99 decays to 12.5 g in 852,000 years, what is its half-life?852,000 years3,408,000 years213,000 years4 years30s
- Q3A 50 g sample of iodine-131 sample decays to 6.25 g, how many half-lives have passed?321430s
- Q4What percent of hafnium-156 remains undecayed , if a 50 g sample decays to 6.25 g?25%50%87.5%12.5%30s
- Q5Chromium-48 has a half-life of 21.6 hours, how much of the sample has decayed after 108 hours if the beginning mass was 360 g?15/16.1251/81/1630s