Question 1

The average mass of the atoms of an element in naturally occurring samples is called the ______________ mass of the element.

Accepted Answer

A)  atomic 
B)  average 
C)  relative 
D)  molecular 
A)  atomic 
B)  average 
C)  relative 
D)  molecular

Question 2

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.

Question 3

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 4

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

Question 5

The number of neutrons in a deuteron is ______________.

Accepted Answer

The answer of The number of neutrons in a deuteron...

Question 6

Complete the equation:   ______________

Accepted Answer

The answer of Complete the equation:   ______________ ...

Question 7

Who discovered radium?

Accepted Answer

A)  Marie and Pierre Curie 
B)  Ernest Rutherford 
C)  Henri Becquerel 
D)  Niels Bohr 
A)  Marie and Pierre Curie 
B)  Ernest Rutherford 
C)  Henri Becquerel 
D)  Niels Bohr

Question 8

Which type of atom is the standard on which the atomic mass scale is based?

Accepted Answer

A)  12C 
B)  16O 
C)  1H 
D)  56Fe 
A)  12C 
B)  16O 
C)  1H 
D)  56Fe

Question 9

How many neutrons are there in an atom of   ?

Accepted Answer

A)  92 
B)  143 
C)  235 
D)  None of these 
A)  92 
B)  143 
C)  235 
D)  None of these

Question 10

Which isotope of hydrogen is radioactive?

Accepted Answer

A)  Protium 
B)  Tritium 
C)  Deuterium 
D)  Hydronium 
A)  Protium 
B)  Tritium 
C)  Deuterium 
D)  Hydronium

Question 11

The number of electrons in an atom of   is ______________.

Accepted Answer

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

Question 12

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 13

How many protons are there in an atom of   ?

Accepted Answer

A)  12 
B)  34 
C)  23 
D)  11 
A)  12 
B)  34 
C)  23 
D)  11

Question 14

Fusion reactors of the future are likely to use ______________ as fuel.

Accepted Answer

A)  enriched uranium 
B)  plutonium 
C)  americium 
D)  deuterium 
A)  enriched uranium 
B)  plutonium 
C)  americium 
D)  deuterium

Question 15

The time it takes for one-half of a sample of a radionuclide to decay is called its ______________.

Accepted Answer

The answer of The time it takes for one-half of...

Question 16

Complete the equation:   ______________

Accepted Answer

The answer of Complete the equation:   ______________ ...

Question 17

An electron is emitted by an atomic nucleus in the process called ______________ decay.

Accepted Answer

The answer of An electron is emitted by an atomic...

Question 18

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 19

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

Accepted Answer

A)  Uranium. 
B)  Plutonium. 
C)  Protactinium. 
D)  Thorium. 
E)  Neptunium. 
A)  Uranium. 
B)  Plutonium. 
C)  Protactinium. 
D)  Thorium. 
E)  Neptunium.

Question 20

When a neutron hits a   nucleus, one of the two products is an alpha particle. The other product is

Accepted Answer

A)    
B)    
C)    
D)    
E)  none of these. 
A)    
B)    
C)    
D)    
E)  none of these.

Exam 10: Nuclear Physics

The average mass of the atoms of an element in naturally occurring samples is called the ______________ mass of the element.

The diameter of an average nucleus is about

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

Who discovered the electron in 1897?

The number of neutrons in a deuteron is ______________.

Complete the equation: ______________

Who discovered radium?

Which type of atom is the standard on which the atomic mass scale is based?

How many neutrons are there in an atom of ?

Which isotope of hydrogen is radioactive?

The number of electrons in an atom of is ______________.

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

How many protons are there in an atom of ?

Fusion reactors of the future are likely to use ______________ as fuel.

The time it takes for one-half of a sample of a radionuclide to decay is called its ______________.

Complete the equation: ______________

An electron is emitted by an atomic nucleus in the process called ______________ decay.

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

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

When a neutron hits a nucleus, one of the two products is an alpha particle. The other product is

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

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