Question 1

What is the approximate mass of a carbon atom in atomic mass units (amu)? How about a carbon dioxide molecule?

Accepted Answer

A)  A carbon atom has a mass of about 12 amu. Carbon dioxide would then have a mass of 28 amu. 
B)  A carbon atom has a mass of about 6 amu. Carbon dioxide would then have a mass of 32 amu. 
C)  A carbon atom has a mass of about 12 amu. Carbon dioxide would then have a mass of 44 amu. 
D)  A carbon atom has a mass of about 6 amu. Carbon dioxide would then have a mass of 22 amu. 
A)  A carbon atom has a mass of about 12 amu. Carbon dioxide would then have a mass of 28 amu. 
B)  A carbon atom has a mass of about 6 amu. Carbon dioxide would then have a mass of 32 amu. 
C)  A carbon atom has a mass of about 12 amu. Carbon dioxide would then have a mass of 44 amu. 
D)  A carbon atom has a mass of about 6 amu. Carbon dioxide would then have a mass of 22 amu.

Question 2

Why are the atomic masses listed in the periodic table not whole numbers?

Accepted Answer

A)  Scientists have yet to make the precise measurements. 
B)  That would be too much of a coincidence. 
C)  The atomic masses are average atomic masses. 
D)  Today's instruments are able to measure the atomic masses to many decimal places. 
A)  Scientists have yet to make the precise measurements. 
B)  That would be too much of a coincidence. 
C)  The atomic masses are average atomic masses. 
D)  Today's instruments are able to measure the atomic masses to many decimal places.

Question 3

The shell model presented in this book is not very accurate. Why then is it presented?

Accepted Answer

A)  It reminds us that the study of matter relates to the solar system. 
B)  Most instructors are not good enough artists to duplicate the complicated artwork of true model on the chalk board for explanation purposes. 
C)  The shell model is derived from classical physics, which is still the most widely accepted approach to understanding atomic theory. 
D)  The shell model is simpler and easy to understand. 
A)  It reminds us that the study of matter relates to the solar system. 
B)  Most instructors are not good enough artists to duplicate the complicated artwork of true model on the chalk board for explanation purposes. 
C)  The shell model is derived from classical physics, which is still the most widely accepted approach to understanding atomic theory. 
D)  The shell model is simpler and easy to understand.

Question 4

Which of the following determined the ratio of the charge of an electron to its mass?

Accepted Answer

A)  J.J. Thompson's cathode ray deflection experiments 
B)  E. Rutherford's gold foil experiments 
C)  Avogadro's number experiments 
D)  Franklin's kite experiments 
A)  J.J. Thompson's cathode ray deflection experiments 
B)  E. Rutherford's gold foil experiments 
C)  Avogadro's number experiments 
D)  Franklin's kite experiments

Question 5

Which element has the atomic number 12?

Accepted Answer

A)  Mg 
B)  C 
C)  B 
D)  Na 
E)  Be 
A)  Mg 
B)  C 
C)  B 
D)  Na 
E)  Be

Question 6

What does the following element description actually mean?   O

Accepted Answer

A)  an oxygen atom with 6 protons and 12 neutrons 
B)  an oxygen atom with 6 neutrons and 12 protons 
C)  6 oxygen atoms with 18 neutrons 
D)  18 oxygen molecules with 6 neutrons each 
E)  none of the above 
A)  an oxygen atom with 6 protons and 12 neutrons 
B)  an oxygen atom with 6 neutrons and 12 protons 
C)  6 oxygen atoms with 18 neutrons 
D)  18 oxygen molecules with 6 neutrons each 
E)  none of the above

What is the approximate mass of a carbon atom in atomic mass units (amu)? How about a carbon dioxide molecule?

Why are the atomic masses listed in the periodic table not whole numbers?

The shell model presented in this book is not very accurate. Why then is it presented?

Which of the following determined the ratio of the charge of an electron to its mass?

Which element has the atomic number 12?

What does the following element description actually mean? O

About Science

Particles of Matter

Elements of Chemistry

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

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Exam 4: Subatomic Particles

What is the approximate mass of a carbon atom in atomic mass units (amu)? How about a carbon dioxide molecule?

Why are the atomic masses listed in the periodic table not whole numbers?

The shell model presented in this book is not very accurate. Why then is it presented?

Which of the following determined the ratio of the charge of an electron to its mass?

Which element has the atomic number 12?

What does the following element description actually mean? O

About Science

Particles of Matter

Elements of Chemistry

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters