Test Bank all Chapter

Chemical Principles, 8e Steven Zumdahl Donald DeCoste

(Test Bank all Chapter)

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Chapter 01 - Atoms, Molecules, and Ions

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• According to the law of definite proportions,
• the ratio of the masses of the elements in a compound is always the same.
• it is not possible for the same two elements to form more than one compound.
• if the same two elements form two different compounds, they do so in the same ratio.
• the total mass after a chemical change is the same as before the change.

ANSWER: a

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.2

KEYWORDS: compound | general chemistry | general concepts | matter

• Which of the following pairs of compounds can be used to illustrate the law of multiple proportions?
• CaO and CaCl2
• NO and NO2
• H2S and HBr
• SiH4 and SiO2
• NF3 and NCl3

ANSWER: b

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.2

KEYWORDS: compound | general chemistry | general concepts | matter

• How many of the following did Dalton not discuss in his atomic theory?
• isotopes

II. ions III. protons IV. neutrons

• electrons
• 2
• 5
• 4
• 1
• 3

ANSWER: b

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.3

KEYWORDS: atomic theory of matter | Dalton's atomic theory | early atomic theory | general chemistry

• When 2.0 L of oxygen gas (O2) reacts with 1.0 L of nitrogen gas (N2), 2.0 L of gaseous product is formed. 2 / 4

Chapter 02 - Atoms, Molecules, and Ions

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All volumes of gases are measured at the same temperature and pressure. What is the formula of the product?

• NO
• NO4
• N2O3
• N2O
• NO2

ANSWER: e

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.4

KEYWORDS: chemical formula | chemical substance | early atomic theory | general chemistry | molecular substance

• Which one of the following statements about atomic structure is false?
• Almost all of the mass of the atom is concentrated in the nucleus.
• The protons and neutrons in the nucleus are very tightly packed.
• The number of protons and the number of neutrons are always the same in the neutral atom.
• The electrons occupy a very large volume compared to the nucleus.

ANSWER: c

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.4

2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | nuclear structure

• Which of the experiments listed below did not provide the information stated about the nature of the atom?
• The Rutherford experiment proved that the Thomson "plum pudding" model of the atom was

essentially correct.

• The Rutherford experiment determined the charge on the nucleus.
• The cathode-ray tube proved that electrons have a negative charge.
• Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the

charge on the electron.

ANSWER: a

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.5

KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | structure of the atom

• Which of the following atomic symbols is incorrect?

a.31 15P b.19

9F 3 / 4

Chapter 02 - Atoms, Molecules, and Ions

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c.34 17Cl d.39 19K e.15 8C

ANSWER: e

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.5

KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope

• The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its

nucleus

• 75 protons, 110 neutrons.
• 75 protons, 75 neutrons.
• 75 protons, 130 neutrons.
• 130 protons, 75 neutrons.
• not enough information is given.

ANSWER: a

POINTS: 1

DIFFICULTY: easy

TOPICS: 2.5

KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope

• Which of the following statements is(are) true?
• O and F have the same number of neutrons.

II.C and N are isotopes of each other because their mass numbers are the same.

III. O

2– has the same number of electrons as Ne.

• I only
• II only
• III only
• I and II only
• I and III only

ANSWER: c

POINTS: 1

DIFFICULTY: moderate

TOPICS: 2.5

KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope

• Which among the following represent a set of isotopes? Atomic nuclei containing
• 20 protons and 20 neutrons.

II. 21 protons and 19 neutrons.

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