Exploring Radioactivity

What are the three main types of radiation?

• Alpha particles, beta particles, gamma rays

• X-rays, neutron particles, positrons

• Infrared radiation, ultraviolet radiation, microwaves

• Cosmic rays, sound waves, electric fields

Explain the concept of half-life in radioactive decay.

• Half-life is the time it takes for half of a radioactive substance to decay.

• Half-life refers to the time it takes for a substance to double in quantity.

• Half-life is the time required for a radioactive substance to become stable.

• Half-life is the total time a radioactive substance remains unchanged.

What is the difference between alpha, beta, and gamma radiation?

• Alpha radiation is high-energy photons, beta radiation is helium nuclei, and gamma radiation is electrons.

• Alpha radiation is helium nuclei, beta radiation is electrons/positrons, and gamma radiation is high-energy photons.

• Alpha radiation is electrons, beta radiation is positrons, and gamma radiation is helium nuclei.

• Alpha radiation is a type of sound wave, beta radiation is a type of light wave, and gamma radiation is a type of heat wave.

List two applications of radioactivity in medicine.

• X-rays for imaging

• Blood transfusions

• Ultrasound for diagnostics

• 1) PET scans, 2) Radiotherapy

How does radioactive decay follow the law of exponential decay?

• Radioactive decay follows the law of exponential decay because the rate of decay is proportional to the remaining quantity, leading to an exponential decrease over time.

• Radioactive decay increases at a constant rate over time.

• Radioactive materials become stable immediately after decay.

• The decay process is linear and does not depend on the remaining quantity.