Question 1

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 B)
G) B) and C)

Question 2

Which of the following sets are isoelectronic (i.e., have the same number of electrons) ?Br−, Kr, Sr2+C, N−, O2−Mg2+, Ca2+, Sr2+O2−, O, O2+Ag+, Cd2+, Pd

Accepted Answer

A)  i and ii
B)  i and v
C)  i, iii and iv
D)  ii, iii and v
E)  i, iii iv and vF) A) and B)
G) C) and D)

Question 3

Kaolinite, a clay mineral with the formula Al4Si4O10(OH) 8, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

Accepted Answer

A)  1.792 mass %
B)  24.80 mass %
C)  30.81 mass %
D)  34.12 mass %
E)  55.81 mass %F) D) and E)
G) B) and D)

Question 4

Which of the following is the empirical formula for hexane, C6H14?

Accepted Answer

A)  C 12H 28
B)  C 6H 14
C)  C 3H 7
D)  CH 2.3
E)  C 0.43HF) A) and C)
G) A) and E)

Question 5

Calcium hydroxide is used in mortar, plaster, and cement. What is its formula?

Accepted Answer

A)  CaOH
B)  CaOH 2
C)  Ca 2OH
D)  Ca(OH) 2
E)  CaHO 2F) D) and E)
G) A) and D)

Question 6

What is the name of P4Se3?

Accepted Answer

A)  Phosphorus selenide
B)  Phosphorus triselenide
C)  Tetraphosphorus selenide
D)  Phosphoric selenide
E)  Tetraphosphorus triselenideF) A) and B)
G) None of the above

Question 7

The substance, KClO3, is a strong oxidizer used in explosives, fireworks, and matches. What is its name?

Accepted Answer

A)  Potassium chlorite
B)  Potassium chloride
C)  Potassium(I) chlorite
D)  Potassium(I) chlorate
E)  Potassium chlorateF) A) and E)
G) B) and E)

Question 8

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

Accepted Answer

A)  FeO
B)  Fe 2O
C)  FeO 3
D)  Fe 2O 5
E)  Fe 2O 3F) None of the above
G) A) and C)

Question 9

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

Accepted Answer

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

Question 10

Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

Accepted Answer

A)  (ClO) 2
B)  Cl 2O
C)  Cl 2O 2
D)  Cl 2O 4
E)  ClO 2F) B) and D)
G) A) and C)

Question 11

What is the formula for lead (II)  oxide?

Accepted Answer

A)  PbO
B)  PbO 2
C)  Pb 2O
D)  PbO 4
E)  Pb 2O 3F) All of the above
G) A) and B)

Question 12

Which of the following ions occurs commonly?

Accepted Answer

A)  P 3+
B)  Br 7+
C)  O 6+
D)  Ca 2+
E)  K −F) All of the above
G) A) and C)

Question 13

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

Accepted Answer

A)  NH 4 + ammonium
B)  S 2− sulfide
C)  CN − cyanide
D)  S 2O 3 2− thiosulfate
E)  ClO 3 − perchlorateF) D) and E)
G) A) and E)

Question 14

Which of the following has the most metallic character?

Accepted Answer

A)  Ge
B)  In
C)  O
D)  P
E)  SbF) C) and D)
G) A) and E)

Question 15

After an atom has lost an electron it becomes a/an __________ and has a __________ charge.

Accepted Answer

A)  anion, positive
B)  isotope, negative
C)  anion, negative
D)  cation, positive
E)  nucleus, positiveF) A) and B)
G) B) and D)

Question 16

In the ionic compound with the general formula M2 X3, the likely charge on X is

Accepted Answer

A)  +1.
B)  +3.
C)  −1.
D)  −2.
E)  −3.F) B) and D)
G) C) and D)

Question 17

Who is credited with discovering the atomic nucleus?

Accepted Answer

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

Question 18

When an atom is represented by the symbol  , the value of A is the

Accepted Answer

A)  number of neutrons in the atom.
B)  number of protons in the atom.
C)  atomic mass of the element.
D)  total number of electrons and neutrons in the atom.
E)  total number of protons and neutrons in the atom.F) None of the above
G) A) and E)

Question 19

Lead (Pb) is a main-group element.

Accepted Answer

A) True 
 B)False

Question 20

Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials. What is its formula?

Accepted Answer

A)  KMnO 3
B)  KMnO 4
C)  K 2MnO 4
D)  K(MnO 4) 2
E)  K 2Mn 2O 7F) A) and B)
G) A) and C)

Exam 2: The Components of Matter

Which of the following is the empirical formula for hexane, C6H14?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following ions occurs commonly?

Correct AnswerverifiedShow Answer

Who is credited with discovering the atomic nucleus?

Correct AnswerverifiedShow Answer

Which of the following sets are isoelectronic (i.e., have the same number of electrons) ?Br−, Kr, Sr2+C, N−, O2−Mg2+, Ca2+, Sr2+O2−, O, O2+Ag+, Cd2+, Pd

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Lead (Pb) is a main-group element.

Correct AnswerverifiedShow Answer

What is the name of P4Se3?

Correct AnswerverifiedShow Answer

Kaolinite, a clay mineral with the formula Al4Si4O10(OH) 8, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

Correct AnswerverifiedShow Answer

Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The substance, KClO3, is a strong oxidizer used in explosives, fireworks, and matches. What is its name?

Correct AnswerverifiedShow Answer

When an atom is represented by the symbol , the value of A is the

Correct AnswerverifiedShow Answer

After an atom has lost an electron it becomes a/an __________ and has a __________ charge.

Correct AnswerverifiedShow Answer

What is the formula for lead (II) oxide?

Correct AnswerverifiedShow Answer

Which of the following has the most metallic character?

Correct AnswerverifiedShow Answer

In the ionic compound with the general formula M2 X3, the likely charge on X is

Correct AnswerverifiedShow Answer

Calcium hydroxide is used in mortar, plaster, and cement. What is its formula?

Correct AnswerverifiedShow Answer

Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials. What is its formula?

Correct AnswerverifiedShow Answer

Which of the following is the empirical formula for hexane, C₆H₁₄?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following sets are isoelectronic (i.e., have the same number of electrons) ?Br⁻, Kr, Sr²⁺C, N⁻, O²⁻Mg²⁺, Ca²⁺, Sr²⁺O²⁻, O, O²⁺Ag⁺, Cd²⁺, Pd

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the name of P₄Se₃?

Correct Answer
verified

Kaolinite, a clay mineral with the formula Al₄Si₄O₁₀(OH) ₈, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The substance, KClO₃, is a strong oxidizer used in explosives, fireworks, and matches. What is its name?

Correct Answer
verified

Correct Answer
verified

After an atom has lost an electron it becomes a/an and has a charge.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the ionic compound with the general formula M₂ X₃, the likely charge on X is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified