Question 1

Thermonuclear warheads,or hydrogen bombs,are powerful mainly because of the

Accepted Answer

A)  fission process. 
B)  fusion process. 
C)  absorption of neutrons by 238U. 
D)  emission of protons by 238U. 
A)  fission process. 
B)  fusion process. 
C)  absorption of neutrons by 238U. 
D)  emission of protons by 238U.

Question 2

What happens to the atomic number (Z)and the mass number (A)when a nucleus emits a beta particle (electron)?

Accepted Answer

A)  Z increases by 1; A is unchanged. 
B)  Z is unchanged; A is unchanged. 
C)  Z decreases by 2; A decreases by 4. 
D)  Z decreases by 1; A is unchanged. 
A)  Z increases by 1; A is unchanged. 
B)  Z is unchanged; A is unchanged. 
C)  Z decreases by 2; A decreases by 4. 
D)  Z decreases by 1; A is unchanged.

Question 3

What type of decay changes only the energy of a nucleus and not its identity?

Accepted Answer

A)  Positron 
B)  Alpha 
C)  Gamma 
D)  Beta 
A)  Positron 
B)  Alpha 
C)  Gamma 
D)  Beta

Question 4

The nuclide at the top of the "relative stability of nucleus versus mass number" curve is

Accepted Answer

A)  iron-56. 
B)  uranium-235. 
C)  uranium-238. 
D)  helium-4. 
A)  iron-56. 
B)  uranium-235. 
C)  uranium-238. 
D)  helium-4.

Question 5

The c in E = mc2 stands for ______________.

Accepted Answer

Question 6

The number of nucleons in an atom of is ${ } _ { 9 } ^ { 19 } \mathrm {~F}$ ______________.

Accepted Answer

The answer of The number of nucleons in an atom...

Question 7

Isotopes of the element named ______________ probably will be the fuel for the first commercial fusion reactors.

Accepted Answer

The answer of Isotopes of the element named ______________ probably...

Question 8

When undergoes beta decay,the daughter is ${ } _ { 2 } ^ { 6 } \mathrm { He }$

Accepted Answer

A)  ${ } _ { 1 } ^ { 6 } \mathrm { H }$ 
B)  ${ } _ { 2 } ^ { 5 } \mathrm { He }$ 
C)  ${ } _ { 3 } ^ { 6 } \mathrm { Li }$ 
D)  none of these. 
A)  ${ } _ { 1 } ^ { 6 } \mathrm { H }$ 
B)  ${ } _ { 2 } ^ { 5 } \mathrm { He }$ 
C)  ${ } _ { 3 } ^ { 6 } \mathrm { Li }$ 
D)  none of these.

Question 9

What is the symbol used on the periodic table for the element Rubidium?

Accepted Answer

A)  Rf 
B)  Hs 
C)  Rb 
D)  No 
E)  U 
A)  Rf 
B)  Hs 
C)  Rb 
D)  No 
E)  U

Question 10

Radioactivity was discovered in

Accepted Answer

A)  Berlin. 
B)  Berkeley. 
C)  Paris. 
D)  Cambridge. 
A)  Berlin. 
B)  Berkeley. 
C)  Paris. 
D)  Cambridge.

Question 11

Write the equation for the alpha decay of ${ } _ { 90 } ^ { 234 } \mathrm { Th }$

Accepted Answer

The answer of Write the equation for the alpha decay...

Question 12

Complete the equation: ${ } _ { 9 } ^ { 21 } \mathrm {~F} \rightarrow$ 
 ______________ $+ { } _ { - 1 } ^ { 0 } \mathrm { e }$

Accepted Answer

The answer of Complete the equation: \({ } _ {...

Question 13

After two half-lives have gone by,what fraction of the original sample of a radionuclide remains?

Accepted Answer

A)  1/8 
B)  1/4 
C)  1/3 
D)  None of these 
A)  1/8 
B)  1/4 
C)  1/3 
D)  None of these

Question 14

Which of the following types of radiation has the least ability to penetrate matter?

Accepted Answer

A)  Alpha particles 
B)  Gamma rays 
C)  X-rays 
D)  Beta particles 
A)  Alpha particles 
B)  Gamma rays 
C)  X-rays 
D)  Beta particles

Question 15

When an unstable Cd nucleus undergoes gamma decay,the nucleus formed is that of

Accepted Answer

A)  Cadmium. 
B)  Tin. 
C)  Silver. 
D)  Palladium. 
E)  Indium. 
A)  Cadmium. 
B)  Tin. 
C)  Silver. 
D)  Palladium. 
E)  Indium.

Question 16

How many electrons are there in a neutral atom of ${ } _ { 26 } ^ { 56 } \mathrm { Fe }$ ?

Accepted Answer

A)  26 
B)  30 
C)  82 
D)  56 
A)  26 
B)  30 
C)  82 
D)  56

Question 17

No radionuclides decay by emitting

Accepted Answer

A)  protons. 
B)  alpha particles. 
C)  electrons. 
D)  gamma rays. 
A)  protons. 
B)  alpha particles. 
C)  electrons. 
D)  gamma rays.

Question 18

If a radionuclide has a half-life of 8 h,______________ half-lives would go by during 40 h.

Accepted Answer

The answer of If a radionuclide has a half-life of...

Question 19

How many neutrons are there in an atom of ${ } _ { 19 } ^ { 39 } \mathrm {~K}$ ?

Accepted Answer

A)  19 
B)  20 
C)  39 
D)  58 
A)  19 
B)  20 
C)  39 
D)  58

Question 20

The diameter of an average nucleus is about

Accepted Answer

A)  10-5 m. 
B)  10-7 m. 
C)  10-10 m. 
D)  10-14 m. 
A)  10-5 m. 
B)  10-7 m. 
C)  10-10 m. 
D)  10-14 m.

Exam 10: Nuclear Physics

Thermonuclear warheads,or hydrogen bombs,are powerful mainly because of the

What happens to the atomic number (Z)and the mass number (A)when a nucleus emits a beta particle (electron)?

What type of decay changes only the energy of a nucleus and not its identity?

The nuclide at the top of the "relative stability of nucleus versus mass number" curve is

The c in E = mc2 stands for ______________.

The number of nucleons in an atom of is 919 F{ } _ { 9 } ^ { 19 } \mathrm {~F}919​ F ______________.

Isotopes of the element named ______________ probably will be the fuel for the first commercial fusion reactors.

When undergoes beta decay,the daughter is 26He{ } _ { 2 } ^ { 6 } \mathrm { He }26​He

What is the symbol used on the periodic table for the element Rubidium?

Radioactivity was discovered in

Write the equation for the alpha decay of 90234Th{ } _ { 90 } ^ { 234 } \mathrm { Th }90234​Th

Complete the equation: 921 F→{ } _ { 9 } ^ { 21 } \mathrm {~F} \rightarrow921​ F→ ______________ +−10e+ { } _ { - 1 } ^ { 0 } \mathrm { e }+−10​e

After two half-lives have gone by,what fraction of the original sample of a radionuclide remains?

Which of the following types of radiation has the least ability to penetrate matter?

When an unstable Cd nucleus undergoes gamma decay,the nucleus formed is that of

How many electrons are there in a neutral atom of 2656Fe{ } _ { 26 } ^ { 56 } \mathrm { Fe }2656​Fe ?

No radionuclides decay by emitting

If a radionuclide has a half-life of 8 h,______________ half-lives would go by during 40 h.

How many neutrons are there in an atom of 1939 K{ } _ { 19 } ^ { 39 } \mathrm {~K}1939​ K ?

The diameter of an average nucleus is about

Measurement

Motion

Force and Motion

Work and Energy

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

The Chemical Elements

Chemical Bonding

Chemical Reactions

Organic Chemistry

Place and Time

The Solar System

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural G Eology and P Late Tectonics

Minerals, rocks, and Volcanoes

Surface Processes

Geologic Time

Filters

The c in E = mc² stands for ______________.

The number of nucleons in an atom of is ${ } _ { 9 } ^ { 19 } \mathrm {~F}$ ______________.

When undergoes beta decay,the daughter is ${ } _ { 2 } ^ { 6 } \mathrm { He }$

Write the equation for the alpha decay of ${ } _ { 90 } ^ { 234 } \mathrm { Th }$

Complete the equation: ${ } _ { 9 } ^ { 21 } \mathrm {~F} \rightarrow$ ______________ $+ { } _ { - 1 } ^ { 0 } \mathrm { e }$

How many electrons are there in a neutral atom of ${ } _ { 26 } ^ { 56 } \mathrm { Fe }$ ?

How many neutrons are there in an atom of ${ } _ { 19 } ^ { 39 } \mathrm {~K}$ ?