Question 1

Which of the following is a metalloid?

Accepted Answer

A)  carbon,C,Z = 6
B)  sulfur,S,Z = 16
C)  germanium,Ge,Z = 32
D)  iridium,Z = 77
E)  bromine,Br,Z = 35F) B) and E)
G) A) and C)

Question 2

Who is credited with discovering the atomic nucleus?

Accepted Answer

A)  Dalton
B)  Gay-Lussac
C)  Thomson
D)  Millikan
E)  RutherfordF) A) and C)
G) C) and E)

Question 3

Iodine pentafluoride reacts slowly with glass and violently with water.Determine its molecular mass.

Accepted Answer

A)  653.52 amu
B)  259.89 amu
C)  221.90 amu
D)  202.90 amu
E)  145.90 amuF) A) and C)
G) All of the above

Question 4

The compound, (NH4) 2S,can be used in analysis for trace amounts of metals present in a sample.What is its name?

Accepted Answer

A)  ammonium sulfide
B)  diammonium sulfide
C)  ammonium sulfite
D)  ammonia(I) sulfite
E)  ammonium(I) sulfideF) A) and B)
G) None of the above

Question 5

What is the formula for lead (II) oxide?

Accepted Answer

A)  PbO
B)  PbO2
C)  Pb2O
D)  PbO4
E)  Pb2O3 F) A) and B)
G) A) and D)

Question 6

Ammonium sulfate, (NH4) 2SO4,is a fertilizer widely used as a source of nitrogen.Calculate its molecular mass.

Accepted Answer

A)  63.07 amu
B)  114.l0 amu
C)  118.13 amu
D)  128.11 amu
E)  132.13 amuF) C) and E)
G) B) and E)

Question 7

Who is credited with measuring the mass/charge ratio of the electron?

Accepted Answer

A)  Dalton
B)  Gay-Lussac
C)  Thomson
D)  Millikan
E)  RutherfordF) A) and E)
G) B) and D)

Question 8

a.Give the names of the following ions:
(i)O22-
  (ii)SO42-
 b.Write down the formulas of the following ions:
(i)ammonium
(ii)nitrate

Accepted Answer

a.(i)perox...

Question 9

Which of the following elements are the least reactive?

Accepted Answer

A)  alkali metals
B)  noble gases
C)  halogens
D)  alkaline earth metals
E)  metalloidsF) B) and E)
G) A) and D)

Question 10

Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain.What is its formula?

Accepted Answer

A)  ZnAc2
B)  ZnCH3COO
C)  Zn(CH3COO) 2
D)  Zn2CH3COO
E)  ZnCH3COCH3 F) C) and D)
G) A) and D)

Question 11

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,neutron number,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) B) and D)
G) C) and D)

Question 12

Who is credited with first measuring the charge of the electron?

Accepted Answer

A)  Dalton
B)  Gay-Lussac
C)  Thomson
D)  Millikan
E)  RutherfordF) B) and D)
G) B) and E)

Question 13

For each of the following names,write down the corresponding formula,including charge where appropriate (atomic numbers and mass numbers are not required):
a.zinc ion
b.nitrite ion
c.carbonic acid
d.cyanide ion

Accepted Answer

a.Zn²⁺
b.NO₂^-
...

Question 14

Which one of the following combinations of names and formulas of ions is incorrect?

Accepted Answer

A)  O2- oxide
B)  Al3+ aluminum
C)  NO3- nitrate
D)  PO43- phosphate
E)  CrO42- chromateF) All of the above
G) C) and E)

Question 15

Lead (Pb)is a main-group element.

Accepted Answer

A) True 
 B)False

Question 16

Which one of the following statements about atoms and subatomic particles is correct?

Accepted Answer

A)  Rutherford discovered the atomic nucleus by bombarding gold foil with electrons.
B)  The proton and the neutron have identical masses.
C)  The neutron's mass is equal to that of a proton plus an electron.
D)  A neutral atom contains equal numbers of protons and electrons.
E)  An atomic nucleus contains equal numbers of protons and neutrons.F) A) and B)
G) B) and D)

Question 17

Which of the following ions occurs commonly?

Accepted Answer

A)  N3+
B)  S6+
C)  O2-
D)  Ca+
E)  Cl+F) A) and B)
G) B) and D)

Question 18

Rutherford bombarded gold foil with alpha ( α\alphaα ) particles and found that a small percentage of the particles were deflected.Which of the following was not accounted for by the model he proposed for the structure of atoms?

Accepted Answer

A)  the small size of the nucleus
B)  the charge on the nucleus
C)  the total mass of the atom
D)  the existence of protons
E)  the presence of electrons outside the nucleus F) B) and E)
G) C) and E)

Question 19

The substance,CaSe,is used in materials which are electron emitters.What is its name?

Accepted Answer

A)  calcium monoselenide
B)  calcium(II) selenide
C)  calcium selenide
D)  calcium(I) selenide
E)  calcium(II) seleniumF) None of the above
G) C) and D)

Question 20

Barium sulfate is used in manufacturing photographic paper.What is its formula?

Accepted Answer

A)  BaSO4
B)  Ba(SO4) 2
C)  Ba2SO4
D)  Ba2(SO4) 3
E)  BaSO3 F) D) and E)
G) A) and E)

Exam 2: The Components of Matter

What is the formula for lead (II) oxide?

Correct AnswerverifiedShow Answer

For each of the following names,write down the corresponding formula,including charge where appropriate (atomic numbers and mass numbers are not required): a.zinc ion b.nitrite ion c.carbonic acid d.cyanide ion

Correct Answerverifieda.Zn2+ b.NO2-...View AnswerShow Answer

Which one of the following statements about atoms and subatomic particles is correct?

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Lead (Pb)is a main-group element.

Correct AnswerverifiedShow Answer

Barium sulfate is used in manufacturing photographic paper.What is its formula?

Correct AnswerverifiedShow Answer

Which of the following elements are the least reactive?

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The substance,CaSe,is used in materials which are electron emitters.What is its name?

Correct AnswerverifiedShow Answer

Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain.What is its formula?

Correct AnswerverifiedShow Answer

Rutherford bombarded gold foil with alpha ( α\alphaα ) particles and found that a small percentage of the particles were deflected.Which of the following was not accounted for by the model he proposed for the structure of atoms?

Correct AnswerverifiedShow Answer

Who is credited with first measuring the charge of the electron?

Correct AnswerverifiedShow Answer

Which of the following ions occurs commonly?

Correct AnswerverifiedShow Answer

The compound, (NH4) 2S,can be used in analysis for trace amounts of metals present in a sample.What is its name?

Correct AnswerverifiedShow Answer

Who is credited with discovering the atomic nucleus?

Correct AnswerverifiedShow Answer

Which of the following is a metalloid?

Correct AnswerverifiedShow Answer

Ammonium sulfate, (NH4) 2SO4,is a fertilizer widely used as a source of nitrogen.Calculate its molecular mass.

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,neutron number,and mass number,respectively.

Correct AnswerverifiedShow Answer

Who is credited with measuring the mass/charge ratio of the electron?

Correct AnswerverifiedShow Answer

Which one of the following combinations of names and formulas of ions is incorrect?

Correct AnswerverifiedShow Answer

Iodine pentafluoride reacts slowly with glass and violently with water.Determine its molecular mass.

Correct AnswerverifiedShow Answer

a.Give the names of the following ions: (i)O22- (ii)SO42- b.Write down the formulas of the following ions: (i)ammonium (ii)nitrate

Correct Answerverifieda.(i)perox...View AnswerShow Answer

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a.Zn²⁺
b.NO₂^-
...
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Rutherford bombarded gold foil with alpha ( $\alpha$ ) particles and found that a small percentage of the particles were deflected.Which of the following was not accounted for by the model he proposed for the structure of atoms?

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The compound, (NH₄) ₂S,can be used in analysis for trace amounts of metals present in a sample.What is its name?

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Ammonium sulfate, (NH₄) ₂SO₄,is a fertilizer widely used as a source of nitrogen.Calculate its molecular mass.

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a.Give the names of the following ions: (i)O₂^2- (ii)SO₄^2- b.Write down the formulas of the following ions: (i)ammonium (ii)nitrate

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a.(i)perox...
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