Nuclear Physics Quiz

The following equation represents a uranium nucleus decay. What the value of X and Y?

• 0 1

• 1 1

• 1 2

• 2 2

Diagram 2 shows the series of radioactive decay of nucleus R to nucleus V. How many alpha particles and beta particles are emitted in this process?

• 2 1

• 1 2

• 2 2

• 1 1

The following equation represents beta decay. Which of the following is correct about element Y?

• Increases by 1

• No change

• Increases by 1

• No change

The initial mass of a radioactive element is 10 g and its half-life is 6 days. Which of the following statements is true about the mass of the radioactive element?

• 6 days earlier, its mass was 20 g

• 12 days earlier, its mass was 80 g

• 6 days later, its mass was 2.5 g

• 12 days later, its mass was 5.0 g

The half-life of arsenic is 18 days. A sample contains a certain amount of arsenic. After 72 days, only 10 g of the arsenic still remains. What is the initial mass of the arsenic?

• 160 g

• 90 g

• 80 g

• 72 g

The activity sample X becomes 6.25% of its original value after 120 minutes. What is its half-life?

• 30 minutes

• 40 minutes

• 60 minutes

• 120 minutes

A large amount of energy is released when two light nuclei combine to form one heavy nucleus. What is the name of this process?

What is the name of this process?

• Chain reaction

• Nuclear reaction

• Nuclear fission

• Nuclear fusion

A chain reaction takes place because

• U is highly radioactive

• The two nuclei Sr and Xe are still radioactive.

• The number of neutrons released is continuously multiplying as time increases.

• The energy released during the nuclear reaction is very high.

What is the mass defect?

• 9.78 x 10^-30 kg

• 4.42 x 10^-29 kg

• 3.44 x 10^-29 kg

• 6.60 x 10^-27 kg