When a nucleus in an excited state decays to the ground state, the particle emitted is
a. an alpha particle.
b. a beta particle.
c. a gamma ray.
d. an x-ray.
e. none of the above.
[Ques. 2] When a neutron decays to create a proton, another particle emitted is
a. an alpha particle.
b. a beta particle.
c. a gamma ray.
d. an x-ray.
e. none of the above.
[Ques. 3] What's a decay chain?
a. a nuclear chain reaction
b. one radioisotope decaying into another, which decays into another, and so on
c. the triggering of multiple fissions by a single neutron
d. none of the above
[Ques. 4] When sulfur-35 (Z = 16) decays to chlorine-35 (Z = 17), a particle emitted is
a. an alpha particle.
b. a beta particle.
c. a gamma ray.
d. an x-ray.
e. none of the above.
[Ques. 5] When radium-223 (Z = 88) decays to radon-119 (Z = 86), the other particle emitted is
a. an alpha particle.
b. a beta particle.
c. a gamma ray.
d. an x-ray.
e. none of the above.
[Ques. 6] Why is there a radioactive source in a smoke detector?
a. It makes the smoke particles radioactive.
b. It ionizes the air.
c. It powers the alarm when the battery wears out.
d. none of the above
[Ques. 7] What does the moderator do in a nuclear reactor?
a. It is a safety feature that limits the nuclear reaction.
b. It absorbs neutrons.
c. It slows down neutrons.
d. none of the above
[Ques. 8] Why is nuclear reactor waste radioactive?
a. Radiation from the reactor makes everything in or near it radioactive.
b. Used fuel rods contain fission fragments which are radioactive.
c. Spent fuel rods pick up contamination from the reactor.
d. all of the above
[Ques. 9] Low levels of ionizing radiation
a. are dangerous to the human body.
b. can be tolerated by the human body.
c. are beneficial to the human body.
d. none of the above
[Ques. 10] If a substance is radioactive it is definitely
a. dangerous.
b. emitting alpha particles.
c. glowing.
d. useful.
e. all of the above.
f. none of the above.
Indicate whether the statement is true or false
Quick Reply
