Question 1

Who discovered the electron in 1897?

Accepted Answer

A)  Ernest Rutherford 
B)  James Chadwick 
C)  J. J. Thomson 
D)  Niels Bohr 
A)  Ernest Rutherford 
B)  James Chadwick 
C)  J. J. Thomson 
D)  Niels Bohr C

Question 2

The diameter of the average atom is about ______________ m.

Accepted Answer

2.55 * 10^-19 J?

Question 3

When an unstable Arsenic nucleus undergoes alpha decay,the nucleus formed is that of

Accepted Answer

A)  Arsenic. 
B)  Bromine. 
C)  Germanium. 
D)  Gallium. 
E)  Selenium. 
A)  Arsenic. 
B)  Bromine. 
C)  Germanium. 
D)  Gallium. 
E)  Selenium. D

Question 4

If the bombardment of a ${ } _ { 20 } ^ { 40 } \mathrm { Ca }$
Nucleus with an alpha particle produces a deuteron,the other product is

Accepted Answer

A)  ${ } _ { 21 } ^ { 42 } \mathrm { Sc }$ 
B)  ${ } _ { 19 } ^ { 38 } \mathrm {~K}$ 
C)  ${ } _ { 22 } ^ { 44 } \mathrm { Ti }$ 
D)  none of these. 
A)  ${ } _ { 21 } ^ { 42 } \mathrm { Sc }$ 
B)  ${ } _ { 19 } ^ { 38 } \mathrm {~K}$ 
C)  ${ } _ { 22 } ^ { 44 } \mathrm { Ti }$ 
D)  none of these.

Question 5

The analytical procedure that bombards a sample with neutrons and measures the frequency of gamma rays emitted is called

Accepted Answer

A)  the alpha scattering technique. 
B)  carbon dating. 
C)  neutron activation analysis. 
D)  Geiger counting. 
A)  the alpha scattering technique. 
B)  carbon dating. 
C)  neutron activation analysis. 
D)  Geiger counting.

Question 6

What happens to the atomic number (Z)and the mass number (A)when a nucleus emits a gamma ray?

Accepted Answer

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

Question 7

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

Accepted Answer

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

Question 8

The first self-sustaining nuclear fission reaction was achieved in Chicago in 1942 under the direction of a scientist named ______________.

Accepted Answer

The answer of The first self-sustaining nuclear fission reaction was...

Question 9

The number of neutrons available to cause fission in a nuclear reactor is adjusted by inserting or withdrawing the ______________.

Accepted Answer

The answer of The number of neutrons available to cause...

Question 10

The percentage of a radionuclide that would remain after 4 half-lives is ______________.

Accepted Answer

The answer of The percentage of a radionuclide that would...

Question 11

When the number of protons in a nucleus exceeds ______________,the nucleus is unstable.

Accepted Answer

A)  65 
B)  56 
C)  83 
D)  103 
A)  65 
B)  56 
C)  83 
D)  103

Question 12

Neutrons are good "projectiles" for inducing nuclear reactions because they

Accepted Answer

A)  have no electric charge. 
B)  are themselves unstable. 
C)  are highly energetic. 
D)  have no mass. 
A)  have no electric charge. 
B)  are themselves unstable. 
C)  are highly energetic. 
D)  have no mass.

Question 13

The half-life of 20F is 11 s.What fraction of a sample of 20F will remain after 44 s have elapsed?

Accepted Answer

A)  1/4 
B)  1/16 
C)  1/8 
D)  None of these 
A)  1/4 
B)  1/16 
C)  1/8 
D)  None of these

Question 14

When undergoes alpha decay,the daughter is ${ } _ { 88 } ^ { 226 } \mathrm { Ra }$

Accepted Answer

A)  ${ } _ { 86 } ^ { 222 } \mathrm { Rn }$ 
B)  ${ } _ { 90 } ^ { 230 } \mathrm { Th }$ 
C)  ${ } _ { 89 } ^ { 226 } \mathrm { Ac }$ 
D)  ${ } _ { 1 } ^ { 1 } \mathrm { H }$ 
A)  ${ } _ { 86 } ^ { 222 } \mathrm { Rn }$ 
B)  ${ } _ { 90 } ^ { 230 } \mathrm { Th }$ 
C)  ${ } _ { 89 } ^ { 226 } \mathrm { Ac }$ 
D)  ${ } _ { 1 } ^ { 1 } \mathrm { H }$

Question 15

The half-life of 20F is 11 s.What fraction of a sample of 20F will remain after 99 s have elapsed?

Accepted Answer

A)  1/10 
B)  1/9 
C)  1/400 
D)  1/512 
E)  None of these 
A)  1/10 
B)  1/9 
C)  1/400 
D)  1/512 
E)  None of these

Question 16

When an unstable Zr nucleus undergoes alpha decay,the nucleus formed is that of

Accepted Answer

A)  Zr. 
B)  Mo. 
C)  Y. 
D)  Sr. 
E)  Nb. 
A)  Zr. 
B)  Mo. 
C)  Y. 
D)  Sr. 
E)  Nb.

Question 17

A scientist named ______________ discovered the proton in 1919.

Accepted Answer

The answer of A scientist named ______________ discovered the proton...

Question 18

Natural uranium contains about what percentage of the fissionable isotope 235U?

Accepted Answer

A)  50% 
B)  99% 
C)  1% 
D)  19% 
A)  50% 
B)  99% 
C)  1% 
D)  19%

Question 19

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

Accepted Answer

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

Question 20

Enriched uranium is a better nuclear reactor fuel than natural uranium because enriched uranium contains a greater proportion of

Accepted Answer

A) ( 239Pu.) 
B)  (235U.) 
C)  (238U.) 
D)  (2H.) 
A) ( 239Pu.) 
B)  (235U.) 
C)  (238U.) 
D)  (2H.)

Exam 10: Nuclear Physics

Who discovered the electron in 1897?

The diameter of the average atom is about ______________ m.

When an unstable Arsenic nucleus undergoes alpha decay,the nucleus formed is that of

If the bombardment of a 2040Ca{ } _ { 20 } ^ { 40 } \mathrm { Ca }2040​Ca Nucleus with an alpha particle produces a deuteron,the other product is

The analytical procedure that bombards a sample with neutrons and measures the frequency of gamma rays emitted is called

What happens to the atomic number (Z)and the mass number (A)when a nucleus emits a gamma ray?

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

The first self-sustaining nuclear fission reaction was achieved in Chicago in 1942 under the direction of a scientist named ______________.

The number of neutrons available to cause fission in a nuclear reactor is adjusted by inserting or withdrawing the ______________.

The percentage of a radionuclide that would remain after 4 half-lives is ______________.

When the number of protons in a nucleus exceeds ______________,the nucleus is unstable.

Neutrons are good "projectiles" for inducing nuclear reactions because they

The half-life of 20F is 11 s.What fraction of a sample of 20F will remain after 44 s have elapsed?

When undergoes alpha decay,the daughter is 88226Ra{ } _ { 88 } ^ { 226 } \mathrm { Ra }88226​Ra

The half-life of 20F is 11 s.What fraction of a sample of 20F will remain after 99 s have elapsed?

When an unstable Zr nucleus undergoes alpha decay,the nucleus formed is that of

A scientist named ______________ discovered the proton in 1919.

Natural uranium contains about what percentage of the fissionable isotope 235U?

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

Enriched uranium is a better nuclear reactor fuel than natural uranium because enriched uranium contains a greater proportion of

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If the bombardment of a ${ } _ { 20 } ^ { 40 } \mathrm { Ca }$ Nucleus with an alpha particle produces a deuteron,the other product is

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

The half-life of ²⁰F is 11 s.What fraction of a sample of ²⁰F will remain after 44 s have elapsed?

When undergoes alpha decay,the daughter is ${ } _ { 88 } ^ { 226 } \mathrm { Ra }$

The half-life of ²⁰F is 11 s.What fraction of a sample of ²⁰F will remain after 99 s have elapsed?

Natural uranium contains about what percentage of the fissionable isotope ²³⁵U?

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