Question 1

What do chicken noodle soup and garden soil have in common?

Accepted Answer

A)  They are both examples of heterogeneous mixtures.
B)  They both contain elements.
C)  They are both examples of compounds.
D)  nothing

Question 2

Classify the following changes as physical or chemical. Wood burns to ashes; water begins to boil; grass grows; a rock is crushed to powder.

Accepted Answer

A)  chemical; physical; chemical; chemical
B)  chemical; physical; physical; physical
C)  physical; physical; chemical; physical
D)  chemical; physical; chemical; physical

Question 3

Is the following transformation representative of a physical change or a chemical change?

Accepted Answer

A)  chemical change because of the formation of elements
B)  physical change because a new material has been formed
C)  chemical change because the atoms are connected differently
D)  physical change because of a change in phase

Question 4

Which of the following is a metalloid?

Accepted Answer

A)  antimony (atomic no. = 51) 
B)  zinc (atomic no. = 30) 
C)  iodine (atomic no. = 53) 
D)  uranium (atomic no. = 92) 
E)  sulfur (atomic no. = 16)

Question 5

If you filter sea water to remove all of the particles you would be left with a clear ________.

Accepted Answer

A)  homogeneous mixture called a solution
B)  homogeneous mixture called a suspension
C)  heterogeneous mixture called a solution
D)  heterogeneous mixture called a suspension
E)  pure liquid

Question 6

The probe tip of a scanning probe microscope ________.

Accepted Answer

A)  floats above the atoms of a sample
B)  etches into the atoms of a sample
C)  chemically changes the atoms of a sample
D)  injects a magnetic field into the atoms of a sample

Question 7

The repeating trends that take place when examining the elements are called ________.

Accepted Answer

A)  periodicity
B)  the family cycle
C)  the metal shift
D)  a group conscience
E)  none of the above

Question 8

What is the difference between a compound and a mixture?

Accepted Answer

A)  A mixture can be physically separated into its components; a compound cannot be physically separated into its components.
B)  A compound can be physically separated into its components; a mixture cannot be physically separated into its components.
C)  A compound is just a mixture of elements.
D)  The components of a mixture do not have the same properties individually as they do when mixed.
E)  The components of a compound have the same properties individually as they do when mixed.

Question 9

How would you classify the following material? coffee (black)

Accepted Answer

A)  a suspension
B)  a heterogeneous mixture
C)  a solution
D)  an element
E)  a compound

Question 10

If you eat metallic sodium or inhale chlorine gas, you stand a strong chance of dying. Let these two elements react with each other, however, and you can safely sprinkle the compound on your popcorn for better taste. What is going on?

Accepted Answer

A)  After these two elements react they lose the potential energy to cause harm.
B)  All elements are inherently dangerous
C)  Sodium and chlorine from the elemental form is more concentrated than the sodium and chlorine we get from sodium chloride.
D)  Sodium chloride has nothing in common with the properties of the elements sodium and chlorine.

Question 11

Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.

Accepted Answer

A)  group
B)  period
C)  textbook
D)  compound
E)  row

Question 12

About how many elements do you have access to as a consumer of market goods?

Accepted Answer

A)  none
B)  one
C)  ten
D)  one hundred

Question 13

Half-frozen fruit punch is always sweeter than the same fruit punch completely melted because ________.

Accepted Answer

A)  the sugar sinks to the bottom
B)  crystallization is a purifying process
C)  the half-frozen fruit punch is warmer
D)  sugar molecules are less soluble in a half-frozen solution

Question 14

Strontium, Sr (number 38) , is especially dangerous to humans because it tends to accumulate in calcium-dependent bone marrow tissues (calcium, Ca, number 20) . This fact relates to the organization of the periodic table in that strontium and calcium are both ________.

Accepted Answer

A)  metals
B)  in group 2 of the periodic table
C)  made of relatively large atoms
D)  soluble in water

Question 15

How many atoms are in one molecule of Na2SO4?

Accepted Answer

A)  7
B)  2
C)  4
D)  3
E)  24

Question 16

What are metalloids?

Accepted Answer

A)  elements that have some properties like metals and some like nonmetals
B)  elements that are smaller than metals
C)  elements found in asteroids
D)  elements that are larger than nonmetals
E)  elements that have properties different than either the metals or the nonmetals

Question 17

What is the difference between a compound and a mixture?

Accepted Answer

A)  They both consist of atoms from different elements.
B)  The way in which their atoms are bonded together.
C)  One is a solid and the other is a liquid.
D)  The components of a mixture are not chemically bonded together.

Question 18

The oldest known elements in the periodic table are the ones ________.

Accepted Answer

A)  with the lowest atomic numbers
B)  with the highest atomic numbers
C)  that match their Latin names
D)  with atomic symbols that match their modern names

Question 19

Which statement best describes a compound?

Accepted Answer

A)  a material that is made up of a combination of atoms bonded together
B)  a mixture of more than one element
C)  a mixture of atoms
D)  a material that is made up of a single type of atom
E)  none of the above

Question 20

The following image represents which kind of matter?

Accepted Answer

A)  a mixture
B)  a compound
C)  an element
D)  none of the above
E)  all of the above

Exam 3: Elements of Chemistry

What is the difference between a compound and a mixture?

Correct AnswerverifiedShow Answer

The oldest known elements in the periodic table are the ones ________.

Correct AnswerverifiedShow Answer

The repeating trends that take place when examining the elements are called ________.

Correct AnswerverifiedShow Answer

What are metalloids?

Correct AnswerverifiedShow Answer

What do chicken noodle soup and garden soil have in common?

Correct AnswerverifiedShow Answer

About how many elements do you have access to as a consumer of market goods?

Correct AnswerverifiedShow Answer

The following image represents which kind of matter?

Correct AnswerverifiedShow Answer

How would you classify the following material? coffee (black)

Correct AnswerverifiedShow Answer

If you eat metallic sodium or inhale chlorine gas, you stand a strong chance of dying. Let these two elements react with each other, however, and you can safely sprinkle the compound on your popcorn for better taste. What is going on?

Correct AnswerverifiedShow Answer

Is the following transformation representative of a physical change or a chemical change?

Correct AnswerverifiedShow Answer

Which of the following is a metalloid?

Correct AnswerverifiedShow Answer

Half-frozen fruit punch is always sweeter than the same fruit punch completely melted because ________.

Correct AnswerverifiedShow Answer

Which statement best describes a compound?

Correct AnswerverifiedShow Answer

Strontium, Sr (number 38) , is especially dangerous to humans because it tends to accumulate in calcium-dependent bone marrow tissues (calcium, Ca, number 20) . This fact relates to the organization of the periodic table in that strontium and calcium are both ________.

Correct AnswerverifiedShow Answer

The probe tip of a scanning probe microscope ________.

Correct AnswerverifiedShow Answer

Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.

Correct AnswerverifiedShow Answer

If you filter sea water to remove all of the particles you would be left with a clear ________.

Correct AnswerverifiedShow Answer

Classify the following changes as physical or chemical. Wood burns to ashes; water begins to boil; grass grows; a rock is crushed to powder.

Correct AnswerverifiedShow Answer

How many atoms are in one molecule of Na2SO4?

Correct AnswerverifiedShow Answer

What is the difference between a compound and a mixture?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many atoms are in one molecule of Na₂SO₄?

Correct Answer
verified

Correct Answer
verified