Question 1

Metalloids are located where on the periodic table?

Accepted Answer

A) left side 
B) right side 
C) middle 
D) zig-zag diagonal line 
E) none of the above 
A) left side 
B) right side 
C) middle 
D) zig-zag diagonal line 
E) none of the above

Question 2

Mendeleev is best remembered for his pioneering work on determining atomic structure.

Accepted Answer

A) True 
 B)False

Question 3

An atom containing 8 protons,9 neutrons,and 8 electrons would be considered charge-neutral.

Accepted Answer

A) True 
 B)False

Question 4

If an isotope of an element has 27 neutrons and a mass number of 52 ,how many electrons must it have?

Accepted Answer

A) 25 
B) 27 
C) 52 
D) 79 
E) none of the above 
A) 25 
B) 27 
C) 52 
D) 79 
E) none of the above

Question 5

The atomic mass unit is defined as:

Accepted Answer

A) the mass of the hydrogen atom containing only one proton. 
B) the mass of electrons found in a carbon atom containing six protons and neutrons. 
C) 1/12 the mass of a carbon atom containing six protons and six neutrons. 
D) 1/14 the mass of a nitrogen atom containing 7 protons and 7 neutrons. 
E) none of the above 
A) the mass of the hydrogen atom containing only one proton. 
B) the mass of electrons found in a carbon atom containing six protons and neutrons. 
C) 1/12 the mass of a carbon atom containing six protons and six neutrons. 
D) 1/14 the mass of a nitrogen atom containing 7 protons and 7 neutrons. 
E) none of the above

Question 6

Examine the elements listed below and identify the one element that is from a different periodic table group than the others.

Accepted Answer

A) Si 
B) Sn 
C) Ti 
D) Ge 
E) All of these are from the same group. 
A) Si 
B) Sn 
C) Ti 
D) Ge 
E) All of these are from the same group.

Question 7

A fictional element has two isotopes and an atomic mass of 87.08 amu.If the first isotope is 86 amu and the second isotope has a mass of 90 amu.Which isotope has the greatest natural abundance?

Accepted Answer

A) 86 amu 
B) 90 amu 
C) There are equal amounts. 
D) Not enough information provided. 
E) none of the above 
A) 86 amu 
B) 90 amu 
C) There are equal amounts. 
D) Not enough information provided. 
E) none of the above

Question 8

What is the charge on the barium ion?

Accepted Answer

A) 1- 
B) 2- 
C) 1+ 
D) 2+ 
E) none of the above 
A) 1- 
B) 2- 
C) 1+ 
D) 2+ 
E) none of the above

Question 9

An atom of a carbon-14 isotope would contain:

Accepted Answer

A) 6 protons,8 neutrons,and 6 electrons. 
B) 8 protons,6 neutrons,and 8 electrons. 
C) 6 protons,8 neutrons,and 8 electrons. 
D) 14 protons,6 neutrons,and 6 electrons. 
E) 20 protons,6 neutrons,and 20 electrons. 
A) 6 protons,8 neutrons,and 6 electrons. 
B) 8 protons,6 neutrons,and 8 electrons. 
C) 6 protons,8 neutrons,and 8 electrons. 
D) 14 protons,6 neutrons,and 6 electrons. 
E) 20 protons,6 neutrons,and 20 electrons.

Question 10

A fictional element has two naturally occurring isotopes with the natural abundances shown here:   Which statement is TRUE for this element?

Accepted Answer

A) The atomic mass would be less than 18. 
B) The atomic mass would be closer to 18 than to 20. 
C) The atomic mass would be exactly 19. 
D) The atomic mass would be closer to 20 than to 18. 
E) The atomic mass would be greater than 20. 
A) The atomic mass would be less than 18. 
B) The atomic mass would be closer to 18 than to 20. 
C) The atomic mass would be exactly 19. 
D) The atomic mass would be closer to 20 than to 18. 
E) The atomic mass would be greater than 20.

Question 11

A positive charge attracts negative charges and repels other positive charges.

Accepted Answer

A) True 
 B)False

Question 12

All of the positive charge of an atom is concentrated in the nucleus.

Accepted Answer

A) True 
 B)False

Metalloids are located where on the periodic table?

Mendeleev is best remembered for his pioneering work on determining atomic structure.

An atom containing 8 protons,9 neutrons,and 8 electrons would be considered charge-neutral.

If an isotope of an element has 27 neutrons and a mass number of 52 ,how many electrons must it have?

The atomic mass unit is defined as:

Examine the elements listed below and identify the one element that is from a different periodic table group than the others.

A fictional element has two isotopes and an atomic mass of 87.08 amu.If the first isotope is 86 amu and the second isotope has a mass of 90 amu.Which isotope has the greatest natural abundance?

What is the charge on the barium ion?

An atom of a carbon-14 isotope would contain:

A fictional element has two naturally occurring isotopes with the natural abundances shown here: Which statement is TRUE for this element?

A positive charge attracts negative charges and repels other positive charges.

All of the positive charge of an atom is concentrated in the nucleus.

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Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

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Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

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Exam 4: Atoms and Elements

Metalloids are located where on the periodic table?

Mendeleev is best remembered for his pioneering work on determining atomic structure.

An atom containing 8 protons,9 neutrons,and 8 electrons would be considered charge-neutral.

If an isotope of an element has 27 neutrons and a mass number of 52 ,how many electrons must it have?

The atomic mass unit is defined as:

Examine the elements listed below and identify the one element that is from a different periodic table group than the others.

A fictional element has two isotopes and an atomic mass of 87.08 amu.If the first isotope is 86 amu and the second isotope has a mass of 90 amu.Which isotope has the greatest natural abundance?

What is the charge on the barium ion?

An atom of a carbon-14 isotope would contain:

A fictional element has two naturally occurring isotopes with the natural abundances shown here: Which statement is TRUE for this element?

A positive charge attracts negative charges and repels other positive charges.

All of the positive charge of an atom is concentrated in the nucleus.

The Chemical World

Measurement and Problem Solving

Matter and Energy

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters