Question 1

A nucleon has the least mass in the nucleus of

Accepted Answer

A) hydrogen. 
B) iron. 
C) lead. 
D) uranium. 
E) plutonium. 
A) hydrogen. 
B) iron. 
C) lead. 
D) uranium. 
E) plutonium.

Question 2

In a mass spectrometer,a variety of singly ionized atomic nuclei are directed into a magnetic field where they are deflected and strike a detecting screen.The particles to undergo the greatest deflection are the particles with the

Accepted Answer

A) least mass. 
B) greatest mass. 
C) same for all 
A) least mass. 
B) greatest mass. 
C) same for all

Question 3

When a lump of uranium is broken into smaller pieces,the total surface area of the lump

Accepted Answer

A) decreases. 
B) remains the same. 
C) increases. 
A) decreases. 
B) remains the same. 
C) increases.

Question 4

The mass of a nucleus is exactly equal to the sum of the masses of its individual

Accepted Answer

A) separated protons. 
B) separated neutrons. 
C) separated nucleons. 
D) all of these 
E) none of these 
A) separated protons. 
B) separated neutrons. 
C) separated nucleons. 
D) all of these 
E) none of these

Question 5

Compared to the sum of the masses of all the individual nucleons in their separate states that make up a nucleus,the mass of the composite nucleus is

Accepted Answer

A) more. 
B) less. 
C) the same. 
A) more. 
B) less. 
C) the same.

Question 6

In which of these processes is an element of matter changed into a completely different element?

Accepted Answer

A) nuclear fission 
B) nuclear fusion 
C) both of these 
D) neither of these 
A) nuclear fission 
B) nuclear fusion 
C) both of these 
D) neither of these

Question 7

When two light atoms fuse together,mass

Accepted Answer

A) is converted to kinetic energy of neutrons. 
B) is created from energy of other forms. 
C) remains the same. 
D) is gained. 
A) is converted to kinetic energy of neutrons. 
B) is created from energy of other forms. 
C) remains the same. 
D) is gained.

Question 8

If gold were used as nuclear fuel,it would be best

Accepted Answer

A) fused. 
B) fissioned. 
C) either fused or fissioned. 
A) fused. 
B) fissioned. 
C) either fused or fissioned.

Question 9

A chain reaction grows when the average number of liberated neutrons that go on to cause further fissions is

Accepted Answer

A) zero. 
B) less than one. 
C) one. 
D) greater than one. 
A) zero. 
B) less than one. 
C) one. 
D) greater than one.

Question 10

When U-239 emits a beta particle,the nucleus left behind has

Accepted Answer

A) 90 protons. 
B) 91 protons. 
C) 92 protons. 
D) 93 protons. 
E) 94 protons. 
A) 90 protons. 
B) 91 protons. 
C) 92 protons. 
D) 93 protons. 
E) 94 protons.

Question 11

The nucleus with the most tightly bound nucleons is

Accepted Answer

A) hydrogen. 
B) iron. 
C) lead. 
D) uranium. 
E) plutonium. 
A) hydrogen. 
B) iron. 
C) lead. 
D) uranium. 
E) plutonium.

Question 12

The most abundant element in the universe is

Accepted Answer

A) hydrogen. 
B) helium. 
C) lead. 
D) uranium. 
E) americanium. 
A) hydrogen. 
B) helium. 
C) lead. 
D) uranium. 
E) americanium.

Question 13

When U-235 undergoes fission,the two nuclei that result have a total of

Accepted Answer

A) 90 protons. 
B) 91 protons. 
C) 92 protons. 
D) 93 protons. 
E) 94 protons. 
A) 90 protons. 
B) 91 protons. 
C) 92 protons. 
D) 93 protons. 
E) 94 protons.

Question 14

Which will leak more neutrons,two separate lumps of uranium or the same two lumps stuck together?

Accepted Answer

A) two separate lumps 
B) the same two lumps stuck together 
C) both the same 
A) two separate lumps 
B) the same two lumps stuck together 
C) both the same

Question 15

When uranium emits a beta particle,the result is a

Accepted Answer

A) different isotope of uranium. 
B) transuranic element. 
C) protactinium. 
D) thorium. 
E) depends on the isotope of uranium that emits the beta particle 
A) different isotope of uranium. 
B) transuranic element. 
C) protactinium. 
D) thorium. 
E) depends on the isotope of uranium that emits the beta particle

Question 16

Which element has the smaller critical mass;U-235 that releases 2.5 neutrons per fission,or Pu-239 that releases 2.7 neutrons per fission?

Accepted Answer

A) U-235 
B) Pu-239 
C) Both would have the same critical mass. 
A) U-235 
B) Pu-239 
C) Both would have the same critical mass.

Question 17

Compared to protons,the reason neutrons are effective nuclear bullets in nuclear reactions is that a neutron has

Accepted Answer

A) more mass than a proton. 
B) more penetrating power than a proton. 
C) a wider cross section than a proton. 
D) all of these 
E) none of these 
A) more mass than a proton. 
B) more penetrating power than a proton. 
C) a wider cross section than a proton. 
D) all of these 
E) none of these

Question 18

Plutonium is not found in any appreciable amounts in natural ore deposits because it

Accepted Answer

A) is artificially created. 
B) is chemically inert. 
C) is a gas at room temperature. 
D) has a short half-life. 
E) none of these 
A) is artificially created. 
B) is chemically inert. 
C) is a gas at room temperature. 
D) has a short half-life. 
E) none of these

Question 19

Fissioning a lead nucleus yields a net

Accepted Answer

A) absorption of energy. 
B) release of energy. 
C) neither absorption nor release of energy 
A) absorption of energy. 
B) release of energy. 
C) neither absorption nor release of energy

Question 20

Hydrogen is a first-rate fuel for

Accepted Answer

A) nuclear reactions. 
B) chemical reactions. 
C) both of these 
D) neither of these 
A) nuclear reactions. 
B) chemical reactions. 
C) both of these 
D) neither of these

Exam 34: Nuclear Fission and Fusion

A nucleon has the least mass in the nucleus of

In a mass spectrometer,a variety of singly ionized atomic nuclei are directed into a magnetic field where they are deflected and strike a detecting screen.The particles to undergo the greatest deflection are the particles with the

When a lump of uranium is broken into smaller pieces,the total surface area of the lump

The mass of a nucleus is exactly equal to the sum of the masses of its individual

Compared to the sum of the masses of all the individual nucleons in their separate states that make up a nucleus,the mass of the composite nucleus is

In which of these processes is an element of matter changed into a completely different element?

When two light atoms fuse together,mass

If gold were used as nuclear fuel,it would be best

A chain reaction grows when the average number of liberated neutrons that go on to cause further fissions is

When U-239 emits a beta particle,the nucleus left behind has

The nucleus with the most tightly bound nucleons is

The most abundant element in the universe is

When U-235 undergoes fission,the two nuclei that result have a total of

Which will leak more neutrons,two separate lumps of uranium or the same two lumps stuck together?

When uranium emits a beta particle,the result is a

Which element has the smaller critical mass;U-235 that releases 2.5 neutrons per fission,or Pu-239 that releases 2.7 neutrons per fission?

Compared to protons,the reason neutrons are effective nuclear bullets in nuclear reactions is that a neutron has

Plutonium is not found in any appreciable amounts in natural ore deposits because it

Fissioning a lead nucleus yields a net

Hydrogen is a first-rate fuel for

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