, TESTBANK FOR Chemical Principles 9th Edition Zumdahl
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New editions are added regularly – stay connected for updates!
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chapter.
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, Chemical Principles 9E (Zumdahl) – Test Bank
Chapter 2 Atoms, Molecules, and Ions
1. According to the law of definite proportions,
✓ a. the ratio of the masses of the elements in a compound is always the same.
b. it is not possible for the same two elements to form more than one compound.
c. if the same two elements form two different compounds, they do so in the same ratio.
d. the total mass after a chemical change is the same as before the change.
2. Which of the following pairs of compounds can be used to illustrate the law of multiple
proportions?
a. CaO and CaCl 2
✓ b. NO and NO 2
c. H 2 S and HBr
d. SiH 4 and SiO 2
e. NF 3 and NCl 3
3. Which of the following did Dalton discuss in his atomic theory?
a. isotopes
✓ b. atoms
c. protons
d. neutrons
e. electrons
4. When 2.0 L of oxygen gas (O 2 ) reacts with 1.0 L of nitrogen gas (N 2 ), 2.0 L of gaseous
product is formed. All volumes of gases are measured at the same temperature and pressure.
What is the formula of the product?
a. NO
b. NO 4
c. N 2 O 3
d. N 2 O
✓ e. NO 2
5. Which one of the following statements about atomic structure is false?
a. Almost all of the mass of the atom is concentrated in the nucleus.
b. The protons and neutrons in the nucleus are very tightly packed.
✓ c. The number of protons and the number of neutrons are always the same in the neutral atom.
d. The electrons occupy a very large volume compared to the nucleus.
6. Which of the experiments listed below provided information about the nature of the atom?
, a. The Rutherford experiment proved that the Thomson "plum pudding" model of the atom was essentially
correct.
✓ b. The Rutherford experiment determined the charge on the nucleus.
✓ c. The cathode-ray tube proved that electrons have a negative charge.
✓ d. Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the
charge on the electron.
7. Which of the following atomic symbols is incorrect?
a. 31 15 P
b. 19 9 F
c. 34 17 Cl
d. 39 19 K
✓ e. 15 8 C
8. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Which
particles are found in the nucleus of a rhenium-185 atom?
✓ a. 75 protons, 110 neutrons
b. 75 protons, 75 neutrons
c. 75 protons, 130 neutrons
d. 130 protons, 75 neutrons
e. not enough information is given
9. Which of the following statements are true?
a. O and F have the same number of neutrons.
b. C and N are isotopes of each other because their mass numbers are the same.
✓ c. O 2– has the same number of electrons as Ne.
10. Which among the following represent a set of isotopes?
a. 19 protons and 19 neutrons
✓ b. 21 protons and 19 neutrons
c. 22 neutrons and 18 protons
✓ d. 20 protons and 22 neutrons
e. 21 protons and 20 neutrons
11. How many protons, neutrons, and electrons does the atom 39 K have?
a. 20 protons, 19 neutrons, 20 electrons
b. 19 protons, 19 neutrons, 39 electrons
c. 20 protons, 20 neutrons, 19 electrons
d. 19 protons, 19 neutrons, 19 electrons
✓ e. 19 protons, 20 neutrons, 19 electrons
12. An ion is formed
a. by either adding protons to or subtracting protons from the atom.
✓ b. by either adding electrons to or subtracting electrons from the atom.
c. by either adding neutrons to or subtracting neutrons from the atom.
,13. Which is the symbol for the isotope of nitrogen that has 7 protons and 8 neutrons?
a. [image]
b. [image]
c. [image]
✓ d. [image]
14. Which of the following represents a pair of isotopes?
a. 15 7 N, 15 8 O
✓ b. 1 1 H, 2 1 H
c. 14 7 N, 15 8 O
d. 31 15 P, 31 15 P 3–
e. C , C 60
15. Which of the following statements are true?
✓ a. The number of protons is the same for all neutral atoms of an element.
✓ b. The number of electrons is the same for all neutral atoms of an element.
c. The number of neutrons is the same for all neutral atoms of an element.
16. The ion 14 N 3– contains how many of each particle?
a. 7 protons, 7 neutrons, 4 electrons
b. 7 protons, 7 neutrons, 3 electrons
c. 7 protons, 14 neutrons, 7 electrons
✓ d. 7 protons, 7 neutrons, 10 electrons
e. 7 protons, 7 neutrons, 7 electrons
17. The ion 127 I – contains how many of each particle?
a. 53 protons, 74 neutrons, 52 electrons
✓ b. 53 protons, 74 neutrons, 54 electrons
c. 53 protons, 53 neutrons, 53 electrons
d. 53 protons, 74 neutrons, 53 electrons
e. 53 protons, 127 neutrons, 54 electrons
18. An element's most stable ion forms an ionic compound with chlorine having the formula
XCl 2 . If the mass number of the ion is 89 and it has 36 electrons, what is the element and how
many neutrons does it have?
✓ a. Sr, 51 neutrons
b. Kr, 55 neutrons
c. Se, 55 neutrons
d. Kr, 53 neutrons
e. Rb, 52 neutrons
19. Which element does not belong to the family or classification indicated?
a. Br, halogen
b. Na, alkali metal
, ✓ c. As, lanthanides
d. He, noble gas
e. Ru, transition metal
20. Which are alkaline earth halides?
a. MgO, MgS, CaO
b. NaI, KBr, LiF
✓ c. CaF 2 , MgBr 2 , SrI 2
d. Al 2 O 3 , In 2 O 3 , Ga 2 S 3
e. PbI 2 , PbBr 2 , CdF 2
21. Select the group of symbols that would correctly meet the following criteria, respectively.
___ The heaviest noble gas. ___ The transition metal that has 24 electrons as a 3+ ion. ___ The
halogen in the third period. ___ The alkaline earth metal that has 18 electrons as a stable ion.
a. Rn, Cr, Br, Ca
b. Ra, Sc, Br, K
c. Ra, Co, Cl, K
✓ d. Rn, Co, Cl, Ca
22. Which group of elements forms ions with a 2+ charge when they react with nonmetals?
a. Halogens
b. Noble gases
✓ c. Alkaline earth metals
d. Alkali metals
e. Chalcogens
23. Which of the following formulas is not correct?
a. Ba(OH) 2
✓ b. LiS
c. NaI
d. KCl
e. MgSO 3
24. Which of the following have the correct chemical formulas and systematic names?
a. Fe 2 PO4 iron(II) phosphate
✓ b. BaBr 2 barium bromide
✓ c. Li 2 O lithium oxide
d. HF fluoric acid
✓ e. Mg 3 N 2 magnesium nitride
25. Which of the following have the correct chemical formulas and systematic names?
a. HClO hydrochloric acid
✓ b. Cr 2 S 3 chromium(III) sulfide
✓ c. PCl 5 phosphorus pentachloride
, d. CoO cobalt(III) oxide
e. CaSO 3 calcium sulfate
26. Which of the following have the correct systematic names and chemical formulas?
a. iron(II) oxide Fe 2 O 3
✓ b. potassium sulfate K 2 SO 4
c. sodium sulfide NaS
✓ d. zinc nitrate Zn(NO 3 ) 2
e. calcium carbonate Ca 2 (CO 3 ) 2
27. What is the correct formula for barium phosphate?
a. Ba 2 PO 4
✓ b. Ba 3 (PO 4 ) 2
c. Ba 2 (PO 4 ) 3
d. Ba 3 PO 4
e. BaPO 4
28. Which of the following have the correct chemical formulas and systematic names?
✓ a. PCl 3 phosphorus trichloride
✓ b. MgO magnesium oxide
c. Fe 3 PO 4 iron(III) phosphate
✓ d. K 2 O potassium oxide
✓ e. BaCl 2 barium chloride
29. Which formulas are correct?
✓ a. LiF
✓ b. Ca(NO 2 ) 2
c. AlCl 2
✓ d. NaC 2 H 3 O 2
e. Ba 2 S 2
30. What is the correct formula for lead(IV) oxide?
a. PbO 4
b. PbO 3
c. PbO
d. Pb 4 O
✓ e. PbO 2
31. Which of the following have the correct chemical formulas and systematic names?
a. PCl 5 potassium pentachloride
✓ b. Fe 2 O 3 iron(III) oxide
✓ c. HClO 2 chlorous acid
d. BaSO 3 barium sulfate
e. Co 2 O 3 cobalt(II) oxide
,32. Which of the following have the correct chemical formulas and systematic names?
a. Na(OH) 2 sodium hydroxide
✓ b. Mg(C 2 H 3 O 2 ) 2 magnesium acetate
✓ c. ZnS zinc sulfide
✓ d. Fe 2 O 3 iron(III) oxide
✓ e. KCN potassium cyanide
33. Which is the correct formula for copper(I) oxide?
a. CuO
b. CuO 2
c. Cu 2 O 2
✓ d. Cu 2 O
e. Cu 2 O 3
34. Complete the following table. Symbol Number of Protons Number of Neutrons Number of
Electrons Net Charge [image] ■ ■ ■ ■ ■ 31 38 ■ 3+ ■ 52 75 54 ■ [image] ■ 29 ■ 2+
[Open-ended / short-answer — no stored answer]
35. Complete the following table. Symbol 56 Fe 2+ ■ Number of protons ■ 35 Number of
neutrons ■ 45 Number of electrons ■ ■ Atomic number ■ ■ Mass number ■ ■ Net charge ■
1–
[Open-ended / short-answer — no stored answer]
36. Al 2 (SO 4 ) 3
[Open-ended / short-answer — no stored answer]
37. NH 4 NO 3
[Open-ended / short-answer — no stored answer]
38. NaH
[Open-ended / short-answer — no stored answer]
39. K 2 Cr 2 O 7
[Open-ended / short-answer — no stored answer]
40. CCl 4
[Open-ended / short-answer — no stored answer]
41. AgCl
[Open-ended / short-answer — no stored answer]
42. CaSO 4
[Open-ended / short-answer — no stored answer]
43. HNO 3
[Open-ended / short-answer — no stored answer]
,44. N 2 O
[Open-ended / short-answer — no stored answer]
45. SnI 2
[Open-ended / short-answer — no stored answer]
46. ■ sodium dichromate
[Open-ended / short-answer — no stored answer]
47. ■ iron(III) oxide
[Open-ended / short-answer — no stored answer]
48. ■ dinitrogen trioxide
[Open-ended / short-answer — no stored answer]
49. ■ cobalt(II) chloride
[Open-ended / short-answer — no stored answer]
50. ■ aluminum hydroxide
[Open-ended / short-answer — no stored answer]
51. ■ hydrosulfuric acid
[Open-ended / short-answer — no stored answer]
52. ■ sulfurous acid
[Open-ended / short-answer — no stored answer]
53. ■ chlorine dioxide
[Open-ended / short-answer — no stored answer]
54. ■ phosphoric acid
[Open-ended / short-answer — no stored answer]
55. ■ acetic acid
[Open-ended / short-answer — no stored answer]
56. Write the chemical formulas for the following covalent compounds. a) sulfur trioxide
_________________ b) dinitrogen pentasulfide _________________ c) carbon tetrabromide
_________________ d) phosphorous pentachloride _________________ e) selenium monoxide
_________________
[Open-ended / short-answer — no stored answer]
57. Write the names of the following compounds: a) FeSO 4
__________________________________________ b) NaC 2 H 3 O 2
__________________________________________ c) KNO 2
__________________________________________ d) Ca(OH) 2
__________________________________________ e) NiCO 3
__________________________________________
, [Open-ended / short-answer — no stored answer]
58. Which nuclide has more protons than neutrons?
✓ a. [image]
b. [image]
c. [image]
d. [image]
e. [image]
59. An isotope of an element is formed
a. by adding protons to, or removing protons from, the atom.
✓ b. by adding neutrons to, or removing neutrons from, the atom.
c. by adding electrons to, or removing electrons from, the atom.
60. Which statement(s) regarding Antoine Lavoisier and his discovery of the conservation of
mass in chemical reactions must be false.
a. Lavoisier conducted his experiment in an apparatus that trapped all reaction products.
b. Lavoisier was able to make accurate mass measurements.
c. Lavoisier was able to make precise mass measurements.
✓ d. Lavoisier did not trap gases in his experiments because their mass was negligible.
e. A and D
61. The experiments of what two scientists were instrumental in determining the mass and
charge of the electron?
a. Lavoisier and Dalton
b. Rutherford and Curie
c. Thompson and Rutherford
d. Millikan and Cannizzaro
✓ e. Thompson and Millikan
62. Which of the following gases was discovered by Joseph Priestley?
a. neon gas
✓ b. oxygen gas
c. methane gas
d. ammonia gas
e. helium gas
63. At the same temperature and pressure, equal volumes of different gases contain the same
number of particles according to which of the following?
a. Charles’s hypothesis
b. Dalton’s hypothesis
c. Boyle’s hypothesis
✓ d. Avogadro’s hypothesis
e. Bergsman’s hypothesis
Important Notes
The file includes the complete test bank, organized chapter by chapter.
A sample of selected pages has been provided for preview.
All available appendices and Excel files (if included in the original resources) are
provided.
We continuously update our files to ensure you receive the latest and most accurate
editions.
New editions are added regularly – stay connected for updates!
⚠️Note on Answer Keys: If the answer key is not included within the chapter
questions, you will find the complete answers and solutions at the end of each
chapter.
✅ Why Buy From Us?
📚 Complete & organized chapter-by-chapter – no missing content, no guessing.
⚡ Instant digital delivery – get your file the moment you pay, no waiting.
📅 Always up to date – we track new editions so you always get the latest version.
💬 Friendly support – real humans ready to help, anytime you need us.
🔒 Safe & secure – thousands of satisfied students trust us every semester.
🛡️Our Guarantees
💰 Money-Back Guarantee: Not satisfied? We offer a full refund – no questions asked.
🔄 Wrong File? No Problem: Contact us and we will replace it immediately with the
correct version, free of charge.
⏰ 24/7 Support: We are always here – reach out anytime and expect a fast response.
Contact Email:
, Chemical Principles 9E (Zumdahl) – Test Bank
Chapter 2 Atoms, Molecules, and Ions
1. According to the law of definite proportions,
✓ a. the ratio of the masses of the elements in a compound is always the same.
b. it is not possible for the same two elements to form more than one compound.
c. if the same two elements form two different compounds, they do so in the same ratio.
d. the total mass after a chemical change is the same as before the change.
2. Which of the following pairs of compounds can be used to illustrate the law of multiple
proportions?
a. CaO and CaCl 2
✓ b. NO and NO 2
c. H 2 S and HBr
d. SiH 4 and SiO 2
e. NF 3 and NCl 3
3. Which of the following did Dalton discuss in his atomic theory?
a. isotopes
✓ b. atoms
c. protons
d. neutrons
e. electrons
4. When 2.0 L of oxygen gas (O 2 ) reacts with 1.0 L of nitrogen gas (N 2 ), 2.0 L of gaseous
product is formed. All volumes of gases are measured at the same temperature and pressure.
What is the formula of the product?
a. NO
b. NO 4
c. N 2 O 3
d. N 2 O
✓ e. NO 2
5. Which one of the following statements about atomic structure is false?
a. Almost all of the mass of the atom is concentrated in the nucleus.
b. The protons and neutrons in the nucleus are very tightly packed.
✓ c. The number of protons and the number of neutrons are always the same in the neutral atom.
d. The electrons occupy a very large volume compared to the nucleus.
6. Which of the experiments listed below provided information about the nature of the atom?
, a. The Rutherford experiment proved that the Thomson "plum pudding" model of the atom was essentially
correct.
✓ b. The Rutherford experiment determined the charge on the nucleus.
✓ c. The cathode-ray tube proved that electrons have a negative charge.
✓ d. Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the
charge on the electron.
7. Which of the following atomic symbols is incorrect?
a. 31 15 P
b. 19 9 F
c. 34 17 Cl
d. 39 19 K
✓ e. 15 8 C
8. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Which
particles are found in the nucleus of a rhenium-185 atom?
✓ a. 75 protons, 110 neutrons
b. 75 protons, 75 neutrons
c. 75 protons, 130 neutrons
d. 130 protons, 75 neutrons
e. not enough information is given
9. Which of the following statements are true?
a. O and F have the same number of neutrons.
b. C and N are isotopes of each other because their mass numbers are the same.
✓ c. O 2– has the same number of electrons as Ne.
10. Which among the following represent a set of isotopes?
a. 19 protons and 19 neutrons
✓ b. 21 protons and 19 neutrons
c. 22 neutrons and 18 protons
✓ d. 20 protons and 22 neutrons
e. 21 protons and 20 neutrons
11. How many protons, neutrons, and electrons does the atom 39 K have?
a. 20 protons, 19 neutrons, 20 electrons
b. 19 protons, 19 neutrons, 39 electrons
c. 20 protons, 20 neutrons, 19 electrons
d. 19 protons, 19 neutrons, 19 electrons
✓ e. 19 protons, 20 neutrons, 19 electrons
12. An ion is formed
a. by either adding protons to or subtracting protons from the atom.
✓ b. by either adding electrons to or subtracting electrons from the atom.
c. by either adding neutrons to or subtracting neutrons from the atom.
,13. Which is the symbol for the isotope of nitrogen that has 7 protons and 8 neutrons?
a. [image]
b. [image]
c. [image]
✓ d. [image]
14. Which of the following represents a pair of isotopes?
a. 15 7 N, 15 8 O
✓ b. 1 1 H, 2 1 H
c. 14 7 N, 15 8 O
d. 31 15 P, 31 15 P 3–
e. C , C 60
15. Which of the following statements are true?
✓ a. The number of protons is the same for all neutral atoms of an element.
✓ b. The number of electrons is the same for all neutral atoms of an element.
c. The number of neutrons is the same for all neutral atoms of an element.
16. The ion 14 N 3– contains how many of each particle?
a. 7 protons, 7 neutrons, 4 electrons
b. 7 protons, 7 neutrons, 3 electrons
c. 7 protons, 14 neutrons, 7 electrons
✓ d. 7 protons, 7 neutrons, 10 electrons
e. 7 protons, 7 neutrons, 7 electrons
17. The ion 127 I – contains how many of each particle?
a. 53 protons, 74 neutrons, 52 electrons
✓ b. 53 protons, 74 neutrons, 54 electrons
c. 53 protons, 53 neutrons, 53 electrons
d. 53 protons, 74 neutrons, 53 electrons
e. 53 protons, 127 neutrons, 54 electrons
18. An element's most stable ion forms an ionic compound with chlorine having the formula
XCl 2 . If the mass number of the ion is 89 and it has 36 electrons, what is the element and how
many neutrons does it have?
✓ a. Sr, 51 neutrons
b. Kr, 55 neutrons
c. Se, 55 neutrons
d. Kr, 53 neutrons
e. Rb, 52 neutrons
19. Which element does not belong to the family or classification indicated?
a. Br, halogen
b. Na, alkali metal
, ✓ c. As, lanthanides
d. He, noble gas
e. Ru, transition metal
20. Which are alkaline earth halides?
a. MgO, MgS, CaO
b. NaI, KBr, LiF
✓ c. CaF 2 , MgBr 2 , SrI 2
d. Al 2 O 3 , In 2 O 3 , Ga 2 S 3
e. PbI 2 , PbBr 2 , CdF 2
21. Select the group of symbols that would correctly meet the following criteria, respectively.
___ The heaviest noble gas. ___ The transition metal that has 24 electrons as a 3+ ion. ___ The
halogen in the third period. ___ The alkaline earth metal that has 18 electrons as a stable ion.
a. Rn, Cr, Br, Ca
b. Ra, Sc, Br, K
c. Ra, Co, Cl, K
✓ d. Rn, Co, Cl, Ca
22. Which group of elements forms ions with a 2+ charge when they react with nonmetals?
a. Halogens
b. Noble gases
✓ c. Alkaline earth metals
d. Alkali metals
e. Chalcogens
23. Which of the following formulas is not correct?
a. Ba(OH) 2
✓ b. LiS
c. NaI
d. KCl
e. MgSO 3
24. Which of the following have the correct chemical formulas and systematic names?
a. Fe 2 PO4 iron(II) phosphate
✓ b. BaBr 2 barium bromide
✓ c. Li 2 O lithium oxide
d. HF fluoric acid
✓ e. Mg 3 N 2 magnesium nitride
25. Which of the following have the correct chemical formulas and systematic names?
a. HClO hydrochloric acid
✓ b. Cr 2 S 3 chromium(III) sulfide
✓ c. PCl 5 phosphorus pentachloride
, d. CoO cobalt(III) oxide
e. CaSO 3 calcium sulfate
26. Which of the following have the correct systematic names and chemical formulas?
a. iron(II) oxide Fe 2 O 3
✓ b. potassium sulfate K 2 SO 4
c. sodium sulfide NaS
✓ d. zinc nitrate Zn(NO 3 ) 2
e. calcium carbonate Ca 2 (CO 3 ) 2
27. What is the correct formula for barium phosphate?
a. Ba 2 PO 4
✓ b. Ba 3 (PO 4 ) 2
c. Ba 2 (PO 4 ) 3
d. Ba 3 PO 4
e. BaPO 4
28. Which of the following have the correct chemical formulas and systematic names?
✓ a. PCl 3 phosphorus trichloride
✓ b. MgO magnesium oxide
c. Fe 3 PO 4 iron(III) phosphate
✓ d. K 2 O potassium oxide
✓ e. BaCl 2 barium chloride
29. Which formulas are correct?
✓ a. LiF
✓ b. Ca(NO 2 ) 2
c. AlCl 2
✓ d. NaC 2 H 3 O 2
e. Ba 2 S 2
30. What is the correct formula for lead(IV) oxide?
a. PbO 4
b. PbO 3
c. PbO
d. Pb 4 O
✓ e. PbO 2
31. Which of the following have the correct chemical formulas and systematic names?
a. PCl 5 potassium pentachloride
✓ b. Fe 2 O 3 iron(III) oxide
✓ c. HClO 2 chlorous acid
d. BaSO 3 barium sulfate
e. Co 2 O 3 cobalt(II) oxide
,32. Which of the following have the correct chemical formulas and systematic names?
a. Na(OH) 2 sodium hydroxide
✓ b. Mg(C 2 H 3 O 2 ) 2 magnesium acetate
✓ c. ZnS zinc sulfide
✓ d. Fe 2 O 3 iron(III) oxide
✓ e. KCN potassium cyanide
33. Which is the correct formula for copper(I) oxide?
a. CuO
b. CuO 2
c. Cu 2 O 2
✓ d. Cu 2 O
e. Cu 2 O 3
34. Complete the following table. Symbol Number of Protons Number of Neutrons Number of
Electrons Net Charge [image] ■ ■ ■ ■ ■ 31 38 ■ 3+ ■ 52 75 54 ■ [image] ■ 29 ■ 2+
[Open-ended / short-answer — no stored answer]
35. Complete the following table. Symbol 56 Fe 2+ ■ Number of protons ■ 35 Number of
neutrons ■ 45 Number of electrons ■ ■ Atomic number ■ ■ Mass number ■ ■ Net charge ■
1–
[Open-ended / short-answer — no stored answer]
36. Al 2 (SO 4 ) 3
[Open-ended / short-answer — no stored answer]
37. NH 4 NO 3
[Open-ended / short-answer — no stored answer]
38. NaH
[Open-ended / short-answer — no stored answer]
39. K 2 Cr 2 O 7
[Open-ended / short-answer — no stored answer]
40. CCl 4
[Open-ended / short-answer — no stored answer]
41. AgCl
[Open-ended / short-answer — no stored answer]
42. CaSO 4
[Open-ended / short-answer — no stored answer]
43. HNO 3
[Open-ended / short-answer — no stored answer]
,44. N 2 O
[Open-ended / short-answer — no stored answer]
45. SnI 2
[Open-ended / short-answer — no stored answer]
46. ■ sodium dichromate
[Open-ended / short-answer — no stored answer]
47. ■ iron(III) oxide
[Open-ended / short-answer — no stored answer]
48. ■ dinitrogen trioxide
[Open-ended / short-answer — no stored answer]
49. ■ cobalt(II) chloride
[Open-ended / short-answer — no stored answer]
50. ■ aluminum hydroxide
[Open-ended / short-answer — no stored answer]
51. ■ hydrosulfuric acid
[Open-ended / short-answer — no stored answer]
52. ■ sulfurous acid
[Open-ended / short-answer — no stored answer]
53. ■ chlorine dioxide
[Open-ended / short-answer — no stored answer]
54. ■ phosphoric acid
[Open-ended / short-answer — no stored answer]
55. ■ acetic acid
[Open-ended / short-answer — no stored answer]
56. Write the chemical formulas for the following covalent compounds. a) sulfur trioxide
_________________ b) dinitrogen pentasulfide _________________ c) carbon tetrabromide
_________________ d) phosphorous pentachloride _________________ e) selenium monoxide
_________________
[Open-ended / short-answer — no stored answer]
57. Write the names of the following compounds: a) FeSO 4
__________________________________________ b) NaC 2 H 3 O 2
__________________________________________ c) KNO 2
__________________________________________ d) Ca(OH) 2
__________________________________________ e) NiCO 3
__________________________________________
, [Open-ended / short-answer — no stored answer]
58. Which nuclide has more protons than neutrons?
✓ a. [image]
b. [image]
c. [image]
d. [image]
e. [image]
59. An isotope of an element is formed
a. by adding protons to, or removing protons from, the atom.
✓ b. by adding neutrons to, or removing neutrons from, the atom.
c. by adding electrons to, or removing electrons from, the atom.
60. Which statement(s) regarding Antoine Lavoisier and his discovery of the conservation of
mass in chemical reactions must be false.
a. Lavoisier conducted his experiment in an apparatus that trapped all reaction products.
b. Lavoisier was able to make accurate mass measurements.
c. Lavoisier was able to make precise mass measurements.
✓ d. Lavoisier did not trap gases in his experiments because their mass was negligible.
e. A and D
61. The experiments of what two scientists were instrumental in determining the mass and
charge of the electron?
a. Lavoisier and Dalton
b. Rutherford and Curie
c. Thompson and Rutherford
d. Millikan and Cannizzaro
✓ e. Thompson and Millikan
62. Which of the following gases was discovered by Joseph Priestley?
a. neon gas
✓ b. oxygen gas
c. methane gas
d. ammonia gas
e. helium gas
63. At the same temperature and pressure, equal volumes of different gases contain the same
number of particles according to which of the following?
a. Charles’s hypothesis
b. Dalton’s hypothesis
c. Boyle’s hypothesis
✓ d. Avogadro’s hypothesis
e. Bergsman’s hypothesis
