Radioactive Decay Law Quiz

What is the main focus of the video tutorial?

• Exploring the periodic table

• Discussing the laws of motion

• Demonstrating chemical reactions

• Explaining the concept of radioactive decay

In Example 1, what is the initial number of radioactive nuclei?

• 5.00 x 10^19

• 7.14 x 10^17

• 2.88 x 10^20

• 1.00 x 10^18

How is the half-life of a sample calculated in Example 1?

• By dividing the decay constant by the natural log of 2

• By multiplying the decay constant by the natural log of 2

• By subtracting the decay constant from the natural log of 2

• By adding the decay constant to the natural log of 2

What is the half-life of the sample in Example 1?

• 6.93 minutes

• 5.00 minutes

• 8.70 hours

• 2.10 hours

In Example 2, what is the half-life of the tantalum-184 isotope?

• 6.93 minutes

• 5.3 hours

• 8.7 hours

• 2.1 hours

How is the decay constant calculated in Example 2?

• By subtracting the natural log of 2 from the half-life

• By adding the natural log of 2 to the half-life

• By multiplying the natural log of 2 by the half-life

• By dividing the natural log of 2 by the half-life

What is the decay constant for tantalum-184 in Example 2?

• 6.93 minutes

• 2.10 hours

• 0.11 minutes^-1

• 7.97 x 10^-2 hours^-1

In Example 3, what is the initial number of nuclei at time zero?

• 9.18 x 10^19

• 6.0 x 10^19

• 2.7 x 10^10

• 7.8 x 10^13

How is the half-life determined in Example 3?

• By multiplying the remaining nuclei by the initial nuclei

• By using the natural log of the ratio of remaining to initial nuclei

• By adding the remaining nuclei to the initial nuclei

• By subtracting the remaining nuclei from the initial nuclei

What is the calculated half-life in Example 3?

• 2.1 hours

• 5.3 hours

• 8.7 hours

• 6.93 minutes