Question : 11.What the name given to the energy that responsible for : 1318423

 

 

11.What is the name given to the energy that is responsible for holding the protons and neutrons together in the nucleus?

A) nuclear energy

B) kinetic energy

C) static energy

D) binding energy

E) activation energy

 

12. Unstable nuclei become more stable by spontaneously undergoing a change in their nucleus and emitting radiation.  What is the term used to describe this process?

A) stabilization

B) nuclear dissociation

C) radioactive decay

D) nuclear fusion

E) ionization

 

13.What nuclear process is used in commercial nuclear power plants to produce energy?

A) fusion

B) fission

C) metastable induction

D) radiocarbon dating

E) positron emission tomography

 

14.Control rods made of cadmium or boron moderate the fission reactions in nuclear power plants.  Which of the following best describes how control rods function?

A) Control rods absorb the high heat that is produced from the fission reactions, preventing overheating from occurring.

B) Control rods absorb some of the fast moving neutrons that are produced in the fission reactions, preventing their initiation of other fission reactions.

C) Control rods absorb the steam produced when the water is heated to a high temperature, preventing the generation of electricity.

D) Control rods absorb gamma rays that are responsible for initiating a chain reaction.

E) Control rods act as a catalyst for the reverse of the fission reaction, preventing the fission reaction from continuing.

 

15.Which radioactive isotope is involved in radiocarbon dating?

A) C-6

B) C-12

C) C-13

D) C-14

E) Both A and B.

 

16.Why are cancer cells more sensitive to radiation than normal cells?

A) The cells most sensitive to radiation are the ones undergoing rapid cellular division; cancer cells are an example of rapidly dividing cells.

B) The cells most sensitive to radiation are the ones undergoing slow cellular division; cancer cells are an example of slowly dividing cells.

C) The cells most sensitive to radiation are the ones that do not undergo cellular division; cancer cells are an example of cells that do not divide.

D) Cancer cells generally form on top of normal cells; they are therefore the cells closest to the applied radiation.

E) Cancer cells are shielded from radiation by their thick cellular membrane; normal cells lack this cellular membrane.

 

17.What term is used to describe radioactive substances that are used as probes to study internal organs?

A) isotopes

B) tracers

C) metastable nuclides

D) Geiger counter

E) roentgens

 

18.Because iodine tends to concentrate in one particular organ of the body, radioactive iodine is often used as a diagnostic tool to determine how this organ is functioning. In which organ does iodine tend to concentrate?

A) liver

B) kidneys

C) brain

D) pancreas

E) thyroid

 

19.Which is the most widely used radioactive isotope in nuclear medicine?

A) technetium-99m

B) hydrogen-3

C) uranium-235

D) carbon-14

E) plutonium-244

 

20.A high degree of stability is predicted for nuclei with which of the following characteristics?

A) high neutron/proton ratio (>2)

B) more protons than neutrons

C) even number of protons or neutrons

D) odd number of protons

E) large number of protons (84 or more)

 

 

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