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CHEM 1301 SUMMER 2005 TEST 1 VERSION 1 NO CHEATING! BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!] 1. The ancient Greeks believed that matter was made up of four elements. Only one of these elements is described as a pure substance today. Which is it? (A) earth 2. Which of the following is NOT a postulate of Dalton’s atomic theory? (A) (B) (C) (D) (E) all matter is made up of atoms atoms are small and indivisible atoms cannot be created or destroyed atoms of a particular element can differ in some way atoms of different elements are different 3. Two substances, A and B, react together to form C and D. When 4.0 g of A react with the right amount of B, 6.0 g of C and 3.0 g of D are formed. In another experiment with the same substances, 12.0 g of A are reacted to form 18.0 g of C. How many grams of B are formed? (A) 30.0 g 4. Which of the following statements about Rutherford's experiment is false? (A) (B) (C) (D) (E) Alpha particles were used as they are positive. The particles were fired at a piece of aluminum foil. Most of the particles passed through the foil, indicating that most of the atoms were empty space. A very few particles bounced back, indicating the presence of a small, massive, positive nucleus. The experiment led to the discarding of the "plum-pudding" model of the atom (or the "chocolate chip cookie model"). 5. Which of the following elements does NOT have a symbol taken from a LATIN word? (A) iron (B) (B) (B) air 5.0 g copper (C) (C) (C) gold 27.0 g scandium 1 (D) (D) water (E) 15.0 g (D) (E) sodium (E) fire 10.0 g potassium 6. Which of the following elements is correctly matched with its group? (A) (D) phosphorus is an alkali metal nitrogen is a noble gas 7. Which statement is true? (A) (B) (C) (D) (E) The elements may be broadly classified as metals, non-metals and noble gases. Elements in a row in the periodic table have similar chemical properties. In the periodic table that we use, the elements are arranged in order of increasing atomic number. Rutherford's scattering experiment proved that all atoms contain electrons. Experiments using the Cathode Ray Tube proved that all atoms contain electrons. 8. Which of the following is incorrectly named as a law or theory? (A) (B) (C) (D) (E) The law of gravity that things fall to the ground Dalton’s atomic theory that substances are composed of sub-microscopic particles Charles’ law that the volume of a gas increases as the temperature increases Avogadro’s law that the volume of a gas is proportional to the number of sub-microscopic particles VSEPR theory that sub-microscopic molecules adopt shapes based on electron repulsion. 9. Which of the following statements is FALSE? (A) (D) selenium does not conduct electricity silicon is a metalloid 10. Which of the following is a lanthanide? (A) Dy 11. Which of these scientists is NOT matched with the correct nationality? (A) (C) (E) John Dalton was British Ernest Rutherford was British Niels Bohr was German (B) (B) (E) P flubber is a halogen sulfur is a chalcogen (C) (B) (E) iron is malleable hydrogen is a non-metal (C) W (D) (B) (D) manganese is an alkaline earth metal (C) Rn Antoine Lavoisier was French Dmitri Mendeleyev was Russian 2 carbon is ductile (E) U 12. Which of the following statements is TRUE? (A) (B) (C) (D) (E) atoms contain equal numbers of protons and neutrons the mass of an atom is equal to the number of protons + the number of electrons neutrons have a mass of 0 and a charge of 1 to calculate the number of neutrons in an atom, use the mass in the periodic table the atomic number is the number of electrons in an atom 13. Which symbol corresponds to an atom with 26 neutrons and 25 electrons? (A) 51 14. A new type of atom is discovered that has 3 isotopes. 40% of the atoms have a mass of 270, and 35% have a mass of 272. If the remaining isotope has a mass of 273, what is the atomic mass of the element? (A) 270 15. Rubidium is comprised of two isotopes, one of which has a natural abundance of 72% and a mass of 85.00 amu. If the calculated atomic mass for rubidium is 85.56, what is the mass of the second isotope? (A) 89 amu 16. Which of the following statements is incorrect? (A) (C) (E) red light has a shorter wavelength than infrared green light has a higher frequency than blue light radiowaves have a longer wavelength than microwaves 17. What is the energy of light that has wavelength of 8.923 x 10-7 m? (c = 3 x 108 m/s; h = 7.63 x 10-34 Js). (A) (D) 5.912 x 10-31 J 2.229 x 10-19 J Fe (B) (B) (B) 56 Fe (C) 271.0 (C) 50 amu (C) (B) (E) 55 Mn (D) 271.5 (D) 87 amu (D) (B) (D) 2.229 x 10-28 J 1.121 x 106 J Mn 272.0 85 amu (E) (E) (E) 51 Sb 272.5 37 amu ultraviolet has a higher energy than violet light gamma rays are the most energetic form of light (C) 3 51 1.773 x 10-22 J 18. Which of the following statements is true? (A) (C) (E) The lowest energy d-subshell is the 1d Electrons in atoms can have any energy values The sixth shell can contain a maximum of 36 electrons 19. What is the electron configuration of sulfur? (A) 1s22s22p63s23p4 20. What is the last part of the electron configuration of plutonium (Pu) (A) 2f5 (B) (B) 2p4 6d5 (C) (C) (B) (D) 1s21s62s22p6 6f5 4 A maximum of 14 electrons can go into a f-subshell A boron atom has electrons in 3 shells (D) 1s22s21p63s22p4 (E) 3p4 (D) 5d5 (E) 5f5 CHEM 1301 SUMMER 2005 TEST 1 VERSION 2 NO CHEATING! BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!] 1. Which of these scientists is NOT matched with the correct nationality? (A) (C) (E) John Dalton was British Ernest Rutherford was British Niels Bohr was German 2. Which of the following statements is TRUE? (A) (B) (C) (D) (E) atoms contain equal numbers of protons and neutrons the mass of an atom is equal to the number of protons + the number of electrons neutrons have a mass of 0 and a charge of 1 to calculate the number of neutrons in an atom, use the mass in the periodic table the atomic number is the number of electrons in an atom 3. Which symbol corresponds to an atom with 26 neutrons and 25 electrons? (A) 51 4. A new type of atom is discovered that has 3 isotopes. 40% of the atoms have a mass of 270, and 35% have a mass of 272. If the remaining isotope has a mass of 273, what is the atomic mass of the element? (A) 270 5. Rubidium is comprised of two isotopes, one of which has a natural abundance of 72% and a mass of 85.00 amu. If the calculated atomic mass for rubidium is 85.56, what is the mass of the second isotope? (A) 89 amu Fe (B) (B) (B) (B) (D) 56 Fe 271.0 50 amu (C) (C) (C) 55 Antoine Lavoisier was French Dmitri Mendeleyev was Russian Mn 271.5 87 amu 1 (D) (D) (D) 51 Mn 272.0 85 amu (E) (E) (E) 51 Sb 272.5 37 amu 6. Which of the following statements is incorrect? (A) (C) (E) red light has a shorter wavelength than infrared green light has a higher frequency than blue light radiowaves have a longer wavelength than microwaves 7. What is the energy of light that has wavelength of 8.923 x 10-7 m? (c = 3 x 108 m/s; h = 7.63 x 10-34 Js). (A) (D) 5.912 x 10-31 J 2.229 x 10-19 J 8. Which of the following statements is true? (A) (C) (E) The lowest energy d-subshell is the 1d Electrons in atoms can have any energy values The sixth shell can contain a maximum of 36 electrons 9. What is the electron configuration of sulfur? (A) 1s22s22p63s23p4 10. What is the last part of the electron configuration of plutonium (Pu) (A) 2f5 11. The ancient Greeks believed that matter was made up of four elements. Only one of these elements is described as a pure substance today. Which is it? (A) earth (B) (E) (B) (B) (B) 2p4 6d5 air (B) (D) 2.229 x 10-28 J 1.121 x 106 J (C) (C) (C) ultraviolet has a higher energy than violet light gamma rays are the most energetic form of light (C) (B) (D) 1s21s62s22p6 6f5 gold 2 1.773 x 10-22 J A maximum of 14 electrons can go into a f-subshell A boron atom has electrons in 3 shells (D) 1s22s21p63s22p4 (E) 3p4 (D) 5d5 (E) 5f5 (D) water (E) fire 12. Which of the following is NOT a postulate of Dalton’s atomic theory? (A) (B) (C) (D) (E) all matter is made up of atoms atoms are small and indivisible atoms cannot be created or destroyed atoms of a particular element can differ in some way atoms of different elements are different 13. Two substances, A and B, react together to form C and D. When 4.0 g of A react with the right amount of B, 6.0 g of C and 3.0 g of D are formed. In another experiment with the same substances, 12.0 g of A are reacted to form 18.0 g of C. How many grams of B are formed? (A) 30.0 g 14. Which of the following statements about Rutherford's experiment is false? (A) (B) (C) (D) (E) Alpha particles were used as they are positive. The particles were fired at a piece of aluminum foil. Most of the particles passed through the foil, indicating that most of the atoms were empty space. A very few particles bounced back, indicating the presence of a small, massive, positive nucleus. The experiment led to the discarding of the "plum-pudding" model of the atom (or the "chocolate chip cookie model"). 15. Which of the following elements does NOT have a symbol taken from a LATIN word? (A) iron 16. Which of the following elements is correctly matched with its group? (A) (D) phosphorus is an alkali metal nitrogen is a noble gas (B) (B) 5.0 g (C) copper (C) (B) (E) 27.0 g (D) scandium flubber is a halogen sulfur is a chalcogen 3 15.0 g (D) (C) (E) sodium (E) 10.0 g potassium manganese is an alkaline earth metal 17. Which statement is true? (A) (B) (C) (D) (E) The elements may be broadly classified as metals, non-metals and noble gases. Elements in a row in the periodic table have similar chemical properties. In the periodic table that we use, the elements are arranged in order of increasing atomic number. Rutherford's scattering experiment proved that all atoms contain electrons. Experiments using the Cathode Ray Tube proved that all atoms contain electrons. 18. Which of the following is incorrectly named as a law or theory? (A) (B) (C) (D) (E) The law of gravity that things fall to the ground Dalton’s atomic theory that substances are composed of sub-microscopic particles Charles’ law that the volume of a gas increases as the temperature increases Avogadro’s law that the volume of a gas is proportional to the number of sub-microscopic particles VSEPR theory that sub-microscopic molecules adopt shapes based on electron repulsion. 19. Which of the following statements is FALSE? (A) (D) selenium does not conduct electricity silicon is a metalloid 20. Which of the following is a lanthanide? (A) Dy (B) P (B) (E) iron is malleable hydrogen is a non-metal (C) W (D) 4 (C) Rn carbon is ductile (E) U