3. What is the nuclear composition of uranium-235? 1. Which idea of John Dalton is no longer considered part of the modern view of atoms?

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1 North arolina Testing Program EO hemistry Sample Items Goal 1. Which idea of John alton is no longer considered part of the modern view of atoms? toms are extremely small. toms of the same element have identical masses. 3. What is the nuclear composition of uranium-35? 9 electrons protons 9 protons electrons 143 protons + 9 neutrons toms combine in simple whole number ratios to form compounds. 9 protons neutrons toms of different elements can combine in different ratios to form different compounds. 4. Which best describes the relationship between subatomic particles in any neutral atom?. Which best describes the current atomic theory? toms consist of electrons circling in definite orbits around a positive nucleus. toms are composed of electrons in a cloud around a positive nucleus. The number of protons equals the number of electrons. The number of protons equals the number of neutrons. The number of neutrons equals the number of electrons. The number of neutrons is greater than the number of protons. toms can easily be split, at which time they become radioactive. n atom s mass is determined by the mass of its neutrons. 5. What is the name of the compound PbO? lead oxide lead(ii) oxide lead oxide(ii) lead(iv) oxide Page 1 Published January 008. May reproduce for instructional and

2 North arolina Testing Program EO hemistry Sample Items Goal 6. What is the name of Hl ( aq)? chloric acid hydrochloric acid hydrogen chloride 9. If the volume of an 18.5-g piece of 3 metal is.35 cm, what is the identity of the metal? iron lead perchloric acid nickel zinc 7. What is the chemical formula for calcium nitrate? ano3 10. Which substance listed in the table is a liquid at 7? a(no ) a(no 3) I Melting Point 8 oiling Point 140 a3n II 10 5 III IV Which is the correct formula for dinitrogen pentoxide? I NO 4 II NO III NO 5 IV NO4 Page Published January 008. May reproduce for instructional and

3 North arolina Testing Program EO hemistry Sample Items Goal 11. Which will increase the solubility of most solid solutes? decreasing the temperature 14. What is the pressure, in atmospheres, exerted by a mol sample of oxygen in a.00-l container at 73? decreasing the amount of solvent at constant temperature atm increasing the amount of solute at constant temperature increasing the temperature atm atm atm 1. What happens to the pressure of a constant mass of gas at constant temperature when the volume is doubled? The pressure is doubled. The pressure remains the same. The pressure is reduced by What type of bonding is associated with compounds that have the following characteristics: high melting points conduct electricity in the molten state solutions conduct electricity normally crystalline solids at room temperature. covalent The pressure is reduced by 1 4. ionic hydrogen 13. The total pressure in a closed vessel containing N, O and O is 30 atm. If the partial pressure of N is 4 atm, and the partial pressure of O is 6 atm, what is the partial pressure of O? metallic 0 atm 30 atm 40 atm 50 atm Page 3 Published January 008. May reproduce for instructional and

4 North arolina Testing Program EO hemistry Sample Items Goal 16. Which is a unique characteristic of the bonding between metal atoms? toms require additional electrons to reach a stable octet. 17. Which pair of elements would most likely bond to form a covalently bonded compound? sodium and fluorine toms must give away electrons to reach a stable octet. toms share valence electrons only with neighboring atoms to reach a stable octet. barium and chlorine phosphorus and oxygen magnesium and sulfur elocalized electrons move among many atoms creating a sea of electrons. 18. ased on the VSEPR theory, what is the molecular geometry of a molecule of PI 3? linear tetrahedral trigonal planar trigonal pyramidal Page 4 Published January 008. May reproduce for instructional and

5 North arolina Testing Program EO hemistry Sample Items Goal 19. onsider this phase diagram: Temperature ( ) t what temperature does the normal boiling point occur? What happens when energy is removed from liquid water? Molecules slow down, and more hydrogen bonds are formed. Molecules slow down, and more hydrogen bonds are broken. Molecules move faster, and more hydrogen bonds are formed. Molecules move faster, and more hydrogen bonds are broken. End of Goal Sample Items In compliance with federal law, including the provisions of Title IX of the Education mendments of 197, the epartment of Public Instruction does not discriminate on the basis of race, sex, religion, color, national or ethnic origin, age, disability, or military service in its policies, programs, activities, admissions or employment. Page 5 Published January 008. May reproduce for instructional and

6 EO hemistry Goal Sample Items Key Report 1 Objective:.01 nalyze the historical development of the current atomic theory. a. Early contributions: emocritus and alton. b. The discovery of the electron: Thomson and Millikan. c. The discovery of the nucleus, proton and neutron: Rutherford and hadwick. d. The ohr model. e. The quantum mechanical model. Thinking Skill: nalyzing orrect nswer: Objective:.01 nalyze the historical development of the current atomic theory. a. Early contributions: emocritus and alton. b. The discovery of the electron: Thomson and Millikan. c. The discovery of the nucleus, proton and neutron: Rutherford and hadwick. d. The ohr model. e. The quantum mechanical model. Thinking Skill: Knowledge orrect nswer: 3 Objective:.0 Examine the nature of atomic structure. a. Subatomic particles: protons, neutrons, and electrons. b. Mass number and/or tomic number. c. Isotopes. Thinking Skill: pplying orrect nswer: 4 Objective:.0 Examine the nature of atomic structure. a. Subatomic particles: protons, neutrons, and electrons. b. Mass number and/or tomic number. c. Isotopes. Thinking Skill: pplying orrect nswer: 5 Objective:.03 pply the language and symbols of chemistry. a. Name compounds using the IUP conventions. b. Write formulas of simple compounds from their names. Thinking Skill: pplying orrect nswer: 6 Objective:.03 pply the language and symbols of chemistry. a. Name compounds using the IUP conventions. b. Write formulas of simple compounds from their names. Thinking Skill: pplying orrect nswer: Page 1 Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

7 EO hemistry Goal Sample Items Key Report 7 Objective:.03 pply the language and symbols of chemistry. a. Name compounds using the IUP conventions. b. Write formulas of simple compounds from their names. Thinking Skill: pplying orrect nswer: 8 Objective:.03 pply the language and symbols of chemistry. a. Name compounds using the IUP conventions. b. Write formulas of simple compounds from their names. Thinking Skill: pplying orrect nswer: 9 Objective:.04 Identify substances using their physical properties: a. Melting points and/or oiling points. b. ensity. c. Solubility. Thinking Skill: pplying orrect nswer: 10 Objective:.04 Identify substances using their physical properties: a. Melting points and/or oiling points. b. ensity. c. Solubility. Thinking Skill: nalyzing orrect nswer: 11 Objective:.04 Identify substances using their physical properties: a. Melting points and/or oiling points. b. ensity. c. Solubility. Thinking Skill: nalyzing orrect nswer: 1 Objective:.05 nalyze the basic assumptions of kinetic molecular theory and its applications: a. Ideal Gas Equation. b. ombined Gas Law. c. alton s Law of Partial Pressures. Thinking Skill: nalyzing orrect nswer: 13 Objective:.05 nalyze the basic assumptions of kinetic molecular theory and its applications: a. Ideal Gas Equation. Page Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

8 EO hemistry Goal Sample Items Key Report b. ombined Gas Law. c. alton s Law of Partial Pressures. Thinking Skill: pplying orrect nswer: 14 Objective:.05 nalyze the basic assumptions of kinetic molecular theory and its applications: a. Ideal Gas Equation. b. ombined Gas Law. c. alton s Law of Partial Pressures. Thinking Skill: pplying orrect nswer: 15 Objective:.06 ssess bonding in metals and ionic compounds as related to chemical and physical properties. Thinking Skill: nalyzing orrect nswer: 16 Objective:.06 ssess bonding in metals and ionic compounds as related to chemical and physical properties. Thinking Skill: pplying orrect nswer: 17 Objective:.07 ssess covalent bonding in molecular compounds as related to molecular geometry and chemical and physical properties. a. Molecular. b. Macromolecular. c. Hydrogen bonding and other intermolecular forces (dipole/dipole interaction, dispersion). d. VSEPR theory. Thinking Skill: nalyzing orrect nswer: 18 Objective:.07 ssess covalent bonding in molecular compounds as related to molecular geometry and chemical and physical properties. a. Molecular. b. Macromolecular. c. Hydrogen bonding and other intermolecular forces (dipole/dipole interaction, dispersion). d. VSEPR theory. Thinking Skill: nalyzing orrect nswer: 19 Objective:.08 ssess the dynamics of physical equilibria. a. Interpret phase diagrams. b. Factors that affect phase changes. Thinking Skill: nalyzing orrect nswer: Page 3 Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

9 EO hemistry Goal Sample Items Key Report 0 Objective:.08 ssess the dynamics of physical equilibria. a. Interpret phase diagrams. b. Factors that affect phase changes. Thinking Skill: nalyzing orrect nswer: Page 4 Published January 008. May reproduce for instructional and educational purposes only; not for personal or financial gain.

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