Technetium-99m is a radioactive isotope with a half-life of 6 hours. If a sample of was originally 100 mg, how much would remain after 24 hours?Discuss

Data

Activity 1

Data Table 1

Half-life
(x-axis) Total Number of Pennies: Both Heads and Tails Number of Heads Percent of Parent Pennies: Number of Heads
(y-axis) Number of Tails Percent of Daughter Pennies: Number of Tails Ratio of Heads to Tails
0 100 100 100% 0 0% n/a
1
2
3
4
5
6

The three types of radiation were identified in part by their reactions to an electromagnetic field. Based on the information in the background section, how could a magnetic field be used to separate alpha, beta, and gamma radiation?

Graph 1
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2. Radon is a naturally occurring, colorless, odorless, tasteless radioactive gas. Radon can build up in closed spaces like mines or buildings, and both radon and its decay products can be serious health hazards to people living and working where it has accumulated. Radon-224 undergoes alpha decay. What daughter nucleus is produced?

3. Uranium-238 undergoes alpha decay. Into what element does Uranium 238 transmute? What is the atomic number of the new element?

4. Technetium-99m is a radioactive isotope with a half-life of 6 hours. If a sample of was originally 100 mg, how much would remain after 24 hours?

5. How long would it take a 1-kg radioactive substance with a half-life of 100 years to decay into 12.5 g?

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