Question 1

How many neutrons are there in an atom of lead whose mass number is 208?

Accepted Answer

A)   82
B)   126
C)   208
D)   290
E)   none of themF) A) and B)
G) All of the above

Question 2

The empirical formula is the simplest whole number ratio of atoms representing a chemical formula of a molecule.

Accepted Answer

A) True 
 B)False

Question 3

________ are atoms that have the same atomic number (Z) but different mass numbers (A).

Accepted Answer

The answer of ________ are atoms that have the same...

Question 4

What is the name given for the elements in Group 1A in the periodic table?

Accepted Answer

The answer of What is the name given for the...

Question 5

Copper (Cu) is a transition metal.

Accepted Answer

A) True 
 B)False

Question 6

Which of these compounds is most likely to be ionic?

Accepted Answer

A)   NCl3
B)   BaCl2
C)   CO
D)   SO2
E)   SF4F) All of the above
G) B) and E)

Question 7

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81,  . Select the combination which lists the correct atomic number, number of neutrons, and mass number, respectively.

Accepted Answer

A)   35, 46, 81
B)   35, 81, 46
C)   81, 46, 35
D)   46, 81, 35
E)   35, 81, 116F) A) and B)
G) A) and C)

Question 8

What is the law that describes different samples of a given compound that always contain the same elements in the same mass ratio?

Accepted Answer

law of def...

Question 9

Ferric oxide is used as a pigment in metal polishing. Which of the following is its formula?

Accepted Answer

A)   FeO
B)   Fe2O
C)   FeO3
D)   Fe2O5
E)   Fe2O3F) A) and E)
G) C) and E)

Question 10

What is the name of Cu2O?

Accepted Answer

Question 11

What is the term for the total number of neutrons and protons in the nucleus of each atom of an element?

Accepted Answer

A)   Isotope number
B)   Mass number
C)   Mass-to-charge ratio
D)   Atomic number
E)   Atomic mass unitsF) B) and C)
G) A) and B)

Question 12

What is the name of Ba(NO2) 2·3H2O?

Accepted Answer

A)   barium nitrite
B)   trihydrobarium(II)  nitrite
C)   barium nitrite trihydrate
D)   barium(II)  nitrite trihydrate
E)   barium nitrate trihydrateF) B) and E)
G) B) and D)

Question 13

Which pair of elements would be most likely to form an ionic compound?

Accepted Answer

A)   P and Br
B)   Zn and K
C)   F and Al
D)   C and S
E)   Al and RbF) A) and E)
G) B) and E)

Question 14

What term defines a mass which is exactly equal to 1/12 the mass of one carbon-12 atom?

Accepted Answer

A)   Isotope number
B)   Mass number
C)   Mass-to-charge ratio
D)   Atomic number
E)   Atomic mass unitF) C) and D)
G) B) and C)

Question 15

Which of these elements is chemically similar to magnesium?

Accepted Answer

A)   Sulfur
B)   Calcium
C)   Iron
D)   Nickel
E)   PotassiumF) C) and D)
G) B) and E)

Question 16

Which of the following is a metal?

Accepted Answer

A)   Nitrogen, N, Z = 7
B)   Phosphorus, P, Z = 15
C)   Arsenic, As, Z = 33
D)   Thallium, Tl, Z = 81
E)   Silicon, Si, Z = 14F) C) and E)
G) A) and B)

Question 17

The table below describes four atoms.  Which atoms represent the same element?

Accepted Answer

Atoms A and D repres...

Question 18

Which group is given the name chalcogens?

Accepted Answer

The answer of Which group is given the name chalcogens?...

Question 19

The formula for magnesium sulfate is

Accepted Answer

A)   MnS.
B)   MgS.
C)   MnSO3.
D)   MgSO4.
E)   MnSO4.F) A) and B)
G) A) and C)

Question 20

Atoms of the same element with different mass numbers are called

Accepted Answer

A)   ions.
B)   neutrons.
C)   chemical groups.
D)   chemical families.
E)   isotopes.F) All of the above
G) A) and B)

Exam 2: Atoms, Molecules, and Ions

________ are atoms that have the same atomic number (Z) but different mass numbers (A).

Correct AnswerverifiedShow Answer

Which group is given the name chalcogens?

Correct AnswerverifiedShow Answer

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81, . Select the combination which lists the correct atomic number, number of neutrons, and mass number, respectively.

Correct AnswerverifiedShow Answer

Which of the following is a metal?

Correct AnswerverifiedShow Answer

Ferric oxide is used as a pigment in metal polishing. Which of the following is its formula?

Correct AnswerverifiedShow Answer

What is the term for the total number of neutrons and protons in the nucleus of each atom of an element?

Correct AnswerverifiedShow Answer

What term defines a mass which is exactly equal to 1/12 the mass of one carbon-12 atom?

Correct AnswerverifiedShow Answer

What is the name given for the elements in Group 1A in the periodic table?

Correct AnswerverifiedShow Answer

Which of these elements is chemically similar to magnesium?

Correct AnswerverifiedShow Answer

The table below describes four atoms. Which atoms represent the same element?

Correct AnswerverifiedAtoms A and D repres...View AnswerShow Answer

Atoms of the same element with different mass numbers are called

Correct AnswerverifiedShow Answer

The empirical formula is the simplest whole number ratio of atoms representing a chemical formula of a molecule.

Correct AnswerverifiedShow Answer

How many neutrons are there in an atom of lead whose mass number is 208?

Correct AnswerverifiedShow Answer

What is the name of Ba(NO2) 2·3H2O?

Correct AnswerverifiedShow Answer

What is the law that describes different samples of a given compound that always contain the same elements in the same mass ratio?

Correct Answerverifiedlaw of def...View AnswerShow Answer

Which pair of elements would be most likely to form an ionic compound?

Correct AnswerverifiedShow Answer

Copper (Cu) is a transition metal.

Correct AnswerverifiedShow Answer

The formula for magnesium sulfate is

Correct AnswerverifiedShow Answer

What is the name of Cu2O?

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Which of these compounds is most likely to be ionic?

Correct AnswerverifiedShow Answer

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Atoms A and D repres...
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What is the name of Ba(NO₂) ₂·3H₂O?

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law of def...
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What is the name of Cu₂O?

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