SPS3 Radioactivity (SPS3charofradioactivity)
Name:_____________________________________________
Date:________________________
1. A star gives off heat and light from the nuclear fusion reaction that takes place inside. What change happens
during the nuclear reaction?
A. Nitrogen is changed to hydrogen.
C. Hydrogen is changed to nitrogen.
B. Helium is changed to hydrogen.
D. Hydrogen is changed to helium.
2. What is the name for the time required to change a part of a radioactive element to a stable element?
A. half life
B. time span
C. development period
D. effective chemical life
3. In a restaurant kitchen, lamps are used to keep food warm. Which type of electromagnetic radiation do
the lamps emit that is primarily responsible for keeping the food warm?
A. gamma
B. infrared
C. ultraviolet
D. visible
4. Which of these types of radiation is LEAST dangerous to living cells?
A. alpha particles
B. beta particles
C. theta particles
D. gamma waves
5. The half-life of bismuth is 5 days. How much of a 100 gram sample will remain after 20 days?
A. 50 grams
B. 12.5 grams
C. 6.25 grams
D. 0 grams
6. A radioactive isotope has a half-life of 2.0 years. The fraction of a pure sample of the isotope that will have
decayed in 6.0 years is
A. 1/8.
7.
B. 1/3.
C. 3/4.
D. 7/8.
Order these types of nuclear radiation from LOWEST to HIGHEST energy.
A. alpha particles, beta particles, gamma rays, UV-rays
B. alpha particles, beta particles, UV-rays, gamma rays
C. gamma rays, UV-rays, alpha particles, beta particles
D. UV-rays, gamma rays, alpha particles, beta particles
8. The illustration represents what type of nuclear reaction?
A. alpha decay B. beta decay C. fission
D. fusion
9. Today, some power plants use nuclear fission to convert nuclear energy into electrical energy. Which is a
potential risk associated nuclear power plants?
A. decreased dependency on oil
B. thermal pollution of rivers and streams
C. increased carbon dioxide levels in our atmosphere D. reduced sulfur dioxide emissions into the atmosphere
Answer Key
6. D) 7/8.
7. B) alpha particles, beta particles, UV-rays,
gamma rays
8. D) fusion
9. B) thermal pollution of rivers and streams
1. D) Hydrogen is changed to helium.
2. A) half life
3. B) infrared
4. A) alpha particles
5. C) 6.25 grams
1. What particle is emitted in alpha radiation?
A.
Electron
B. photon
C. helium nucleus
D. hydrogen nucleus
2. What happens to the nucleus when a radioactive atom undergoes beta (B) decay?
A. 2 protons are released and the mass is decreased by 4.
B A high energy photon of light is released
C. A neutron decays into a proton and an electron is released
D. Low energy microwaves are released
3) The most penetrating form of radiation is
A. ultra violet.
B. Alpha
C. beta
D. gamma
4) In nuclear fusion, two positively charged nuclei must touch and bind together. This requires that the nuclei
approach each other at
A.
low temperatures and low velocity. B. low temperatures and high velocity
C.
. high temperatures and high velocity
D. high temperatures and low velocity
5. The half-life of technetium-99 is 6.0 hours. From a 20.0 gram sample, what mass remains after 12 hours?
A.
2.5 grams
B. 3.3 grams
C. 5.0 grams
D. 10.0 grams
Answer Key
1.
2.
3.
4.
5.
C
C
D
C
C