Chemistry Atomic Structure and Periodic Relationships Released Test Questions ppt download

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Chemistry Atomic Structure and Periodic Relationships Released Test Questions 2000 – 2009

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2000.11 1.A and B are isotopes of the same element 2.A and B are different elements 3.A has a greater charge than B 4.A is more reactive than B

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2000.12. A neutral atom of calcium has 20 electrons. Calcium forms a 2 + ion. How many electrons does a calcium ion have? 1.2 2.18 3.20 4.22

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2000.13. According to their placement on the periodic table, which elements would have the most similar atomic structures? 1.Sodium and scandium 2.Sodium and barium 3.Sodium and potassium 4.Sodium and aluminum

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2000.14. Oxygen and sulfur are in the same group (16) in the periodic table. This means that, in general, oxygen and sulfur — 1.will react only with each other 2.undergo similar reactions with other elements 3.can only react with elements in group 16 4.combine only with elements in periods of 4 or higher

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2000.15. According to the periodic table, which of the following series of elements is ordered according to decreasing reactivity? 1.He, Cs, Si, Mg 2.Cs, Mg, Si, He 3.Si, He, Cs, Mg 4.Mg, Si, Cs, He

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2000.16. With n representing the outermost energy level, the electron configuration for that level for elements in Group 14 is — 1.ns 2 np 1 2.ns 2 np 2 3.ns 2 np 3 4.ns 2 np 4

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2000.17. An alkali metal will most readily react with — 1.another alkali metal 2.an alkaline earth metal 3.a halogen 4.a noble gas

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2000.18. Neils Bohr’s contribution to modern atomic theory was the proposition that — 1.each atom has a specific number of positive charges 2.an atom has electrons in discrete energy levels 3.electrons have a definite mass that can be computed 4.atomic mass is determined by the number of protons and neutrons in an atom

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2001.11. 1.Al-P 2.Na-Cl 3.K-F 4.Ca-O

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2001.13. Radioactive iodine-131 has a half-life of eight days. The amount of a 200.0 gram sample left after 32 days would be — 1.6.25 g 2.12.5 g 3.25.0 g 4.50.0 g

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2001.15. Which of these describes a tendency for atomic radii as displayed on the periodic chart? 1.Atomic radii decrease left to right across a period. 2.Atomic radii increase left to right across a period. 3.Atomic radii decrease top to bottom down a group. 4.Atomic radii increase, then decrease from top to bottom down a group.

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2001.20. 1.Each atom contains electrons. 2.The nucleus of an atom can be split. 3.Each atom contains protons. 4.Atoms are mostly empty space.

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2001.21. How does the radioactive isotope C-14 differ from its stable counterpart C-12? 1.It has a different number of protons and two less neutrons than C-12. 2.It has the same number of protons and two more electrons than C-12. 3.It has the same number of protons but two more neutrons than C-12. 4.It has a different number of protons and two more neutrons than C-12.

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2001.26. Chlorine forms a 1– ion. How many electrons does a chloride ion have? 1.1 2.16 3.17 4.18

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2001.39. An element has an electron configuration of 1s 2 2s 2 2p 6 3s 2. Which of these will be in the same group as this element? 1.1s 2 2s 2 2p 6 2.1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3.1s 2 2s 2 2p 6 3s 1 4.1s 2 2s 2 2p 6 3s 2 3p 6

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2001.41. Which of these elements is the most chemically active? 1.F 2.Cl 3.Br 4.I

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2002.2. Which of these elements is found in a family with the above electron configuration? ns 2 np 3 12345 1.Al 2.Sr 3.Si 4.Sb

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2002.6. How many protons, neutrons, and electrons are in a neutral atom of sodium? 12345 1.11p +, 12n°, 11e – 2.11p +, 11n°, 12e – 3.12p +, 11n°, 12e – 4.12p +, 11n°, 11e –

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2002.11. Which grouping identifies chemical properties? 12345 1.Malleability, ductility, conductivity 2.Luster, hardness, texture 3.Combustibility, flammability, reactivity 4.Density, melting point, boiling point

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2002.12. From left to right across a period, what change is occurring within the atomic nuclei? 1.A proton is gained 2.An electron is gained 3.A neutron is lost 4.The electron cloud size is decreasing 12345

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2002.23. The understanding that the position of an electron in an electron cloud cannot precisely be determined was developed by Werner Heisenberg and is know as the — 1.Planetary model 2.Uncertainty principle 3.Quantum theory 4.First atomic theory 12345

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2002.24. The chart shows the relationship between the first ionization potential and the increase in atomic number. The letter on the chart that indicates the noble gases or the inert elements is— 1.A 2.B 3.C 4.D 12345

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2002.30. Isotopes of an element have different—- 12345 1.Atomic numbers 2.Atomic masses 3.Numbers of protons 4.Numbers of outer- shell electrons

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2002.44. The elements that are characterized by having only five electrons in the p sublevel belong to which family of elements? 12345 1.Transition 2.Alkali 3.Noble gas 4.Halogens

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2003.7. Which of the following describes what takes place when iron (Fe°) is oxidized to Fe 2+ ions? 12345 1.A gain of two electrons 2.A loss of two electrons 3.A gain of two protons 4.A loss of two protons

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2003.9. Which scientist was the first to conclude through experimentation that atoms have positive charges in their nuclei? 12345 1.Bohr 2.Dalton 3.Mosley 4.Rutherford

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2003.12. Three elements, X,Y, and Z, have consecutive increasing atomic numbers. If element X is a noble gas, what will be the symbol for the ion of element Z in its compounds? 12345 1.Z 2- 2.Z – 3.Z + 4.Z 2+

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2003.23. Atoms of the same element must— 12345 1.Contain the same number of neutrons 2.Have the same mass number 3.Contain the same number of protons 4.Have equal numbers of protons and neutrons

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2003.39. The alkali metals are located in which group of the periodic table? 12345 1.1 2.2 3.3 4.4

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2003.41. Which of these is an ion with a charge of 1+? 1.1 2.2 3.3 4.4 12345 ProtonsNeutronselectrons 1111210 2102 3151615 420 18

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2003.46. An increase in atomic number is related to an increase in atomic mass because– 1.More electrons are present in the atomic nucleus 2.More electrons are orbiting the atomic nucleus 3.More protons are present in the atomic nucleus 4.More protons are orbiting the atomic nucleus

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2003.50. Which of these elements contains four valence electrons? 12345 1.Helium 2.Beryllium 3.Carbon 4.Oxygen

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2004.6. Which of the following orbital diagrams is incorrect because it violates Hund’s rule? 1234567891011121314151617181920 212223242526272829303132 1. 2. 3. 4.

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2004.14. What is the main similarity among elements in group 2? 1234567891011121314151617181920 212223242526272829303132 A.Atomic radius B.Chemical properties C.Mass number D.Boiling point

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2004.17. A neutral atom of aluminum -27 contains 1234567891011121314151617181920 212223242526272829303132 A.13 protons and 27 electrons B.14 protons and 13 neutrons C.13 electrons, 13 protons, and 14 neutron D.13 electrons, 14 protons, and 13 neutrons

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2004.21. Which of the elements is a positive ion with a charge of one? 1234567891011121314151617181920 212223242526272829303132 A.1 B.2 C.3 D.4

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2004.23. Cations are formed when neutral atoms lose – 1234567891011121314151617181920 212223242526272829303132 A.Electrons B.Protons C.Neutrons D.positron

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2004.28. Which of the following properties decreases from left to right across a period? 1234567891011121314151617181920 212223242526272829303132 A.Atomic number B.Electronegativity C.Atomic radius D.Ionization energy

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2004.40. The atomic number corresponds to an atom’s number of- 1234567891011121314151617181920 212223242526272829303132 A.Protons B.Neutrons C.Electrons D.positrons

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2004.43. Which element naturally occurs as a diatomic molecule? 1234567891011121314151617181920 212223242526272829303132 A.Zn B.C C.K D.H

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2005.1. How many valence electrons does a neutral atoms of silicon have? 1234567891011121314151617181920 212223242526272829303132 A.3 B.4 C.5 D.6

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2005.7. At room temperature, chlorine exists as a gas, bromine exists as a liquid, and iodine exists as a solid. The physical states of these elements indicate that melting point – 1234567891011121314151617181920 212223242526272829303132 A.Decreases from top to bottom with group 17 elements B.Is independent of periodic position C.Increases from top to bottom within group 17 elements D.Is constant within group 17 elements

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2005.9. Which represents an atom of calcium? 1234567891011121314151617181920 212223242526272829303132 A.1 B.2 C.3 D.4

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2005.11. A scientists has found the following isotope of oxygen: How many neutrons are present in this isotope? 1234567891011121314151617181920 212223242526272829303132 A.8 B.11 C.19 D.27

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2005.20. The elements that are characterized by the presence of an incomplete d sublevel are called — 1234567891011121314151617181920 212223242526272829303132 A.Transition elements B.Alkali earth metals C.Halogens D.Lanthanoids

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2005.22. The net charge on an aluminum ion is 3 because there are 1234567891011121314151617181920 212223242526272829303132 A.10 protons and 13 electrons in the atom B.13 protons and 10 neutrons in the nucleus C.10 neutrons and 13 electrons in the atom D.13 protons and 10 electrons in the atom

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2005.25. Which of the following is a mixture? 1234567891011121314151617181920 212223242526272829303132 A.Carbon B.Glucose C.Distilled water D.Air

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2005.27. One indicator that electrons in atoms are limited to specific energy levels is that – 1234567891011121314151617181920 212223242526272829303132 A.Atoms move faster when heated B.The light given off by atoms is all at the same wavelength C.The Doppler effect shows a shift in wavelength for H-atom light D.Light emitted from excited atoms occurs only at specific wavelengths

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2007.2. Atoms of the noble gases are generally inert because– 1234567891011121314151617181920 21222324252627282930 1.They are too large to react. 2.They are not charged. 3.They are neutral atoms. 4. Their outer electron levels are filled.

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2007.9. What are the numbers of protons, neutrons, and electrons in an isotope of titanium with a mass number of 50? 1234567891011121314151617181920 21222324252627282930 1.22p, 22n, 28e 2.28p, 22n, 22e 3.50p,22n, 50e 4.22p, 28n, 22e

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2007.16. How many protons are in an atom represented by 220 88 Ra? 1234567891011121314151617181920 21222324252627282930 1.88 2.132 3.220 4.308

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2007.21. A chloride ion (Cl-) has the same number of electrons as a neutral atom of — 1234567891011121314151617181920 21222324252627282930 1.Fluorine 2.Sulfur 3.Argon 4.Bromine

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2007.23. Which of the following is most likely the electronegativity value for chlorine? 1234567891011121314151617181920 21222324252627282930 1.2.3 2.2.7 3.3.0 4.4.2

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2007.31. When compared to sulfur-32, sulfur-34 has more– 1234567891011121314151617181920 21222324252627282930 1.Protons 2.Neutrons 3.Energy levels 4.Bonding configurations

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2007.34. In HNO 3, the oxidation state of hydrogen is +1 and the oxidation state of oxygen is -2. Therefore, the oxidation state of nitrogen is— 1234567891011121314151617181920 21222324252627282930 1.-1 2.+3 3.+4 4.+5

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2007.40. Place the following models about the structure of the atom in the order that they were developed: 1. Planetary model 2. Quantum mechanical model 3. Solid sphere model 1234567891011121314151617181920 21222324252627282930 1.1,3,2 2.1,2,3 3.2,3,1 4.3,1,2

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2008.2. Iodine-131 is a radioactive isotope with a half life of 8 days. How many grams of a 64 g sample of iodine-131 will remain at the end of 24 days? 1234567891011121314151617181920 212223242526272829303132 A.56 g B.48 g C.32 g D.8 g

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2008.8. Which of these elements has the smallest atomic radius? 1234567891011121314151617181920 212223242526272829303132 A.Beryllium (Be) B.Oxygen (O) C.Sodium (Na) D.Sulfur (S)

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2008.10. An atom contains 70 protons, 70 electrons, and 99 neutrons. What is the mass number? 1234567891011121314151617181920 212223242526272829303132 A.239 B.169 C.140 D.70

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2008.16. A sodium atom has an electron configuration of 1s 2 2s 2 2 p 6 3s 1. If the sodium atom becomes ionized, its new electron configuration will be the same as which element? 1234567891011121314151617181920 212223242526272829303132 A.Lithium B.Neon C.Magnesium D.Potassium

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2008.18. Which of the following particles has a positive on (+1) charge? 1234567891011121314151617181920 212223242526272829303132 A.Alpha B.Electron C.Neutron D.Proton

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2008.24. C-12 and C-13 are naturally-occurring isotopes of the element carbon. C-12 occurs 98.89% of the time and C-13 occurs 1.108% of the time. What calculation should be used to determine the atomic mass of this element? 1234567891011121314151617181920 212223242526272829303132 A. B. C. D.

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2008.27. In order to determine the identity of a substance, a student listed the following properties. Which of the following is a chemical property? 1234567891011121314151617181920 212223242526272829303132 A.Oxidizes in air B.Conducts an electric current C.Attraction to a magnet D.Dissolves in water

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2008.35. Which element is a noble gas? 1234567891011121314151617181920 212223242526272829303132 A.Fluorine (F) B.Hydrogen (H) C.Nitrogen (N) D.Xenon (Xe)

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2009.2. 1234567891011121314151617181920 21222324252627282930 1.At STP, potassium is in the solid phase, but argon is a gas. 2.It is easier for a potassium atom to lose an electron than it is for an argon atom. 3.The most common isotopes of argon have more protons than the most common isotopes of potassium. 4.The most common isotopes of potassium have fewer neutrons than the most common isotopes of argon.

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2009.10. How many electrons does the iron have when it forms the ionic compound FeCl 3 ? 1234567891011121314151617181920 21222324252627282930 1.20 2.23 3.26 4.29

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2009.17. 1234567891011121314151617181920 21222324252627282930 1.It has the same number of neutrons as potassium. 2.It is a transition metal from the same period as potassium. 3.It is one of the heaviest elements in potassium’s group. 4.It is a mix of three unstable isotopes of potassium.

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2009.22. Which of the following is a chemical change? 1234567891011121314151617181920 21222324252627282930 1.Salt is dissolved in water. 2.Water is boiled on a stove. 3.Gasoline combusts in an engine. 4.Copper metal is stretch into a long wire.

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2009.26. A student hypothesizes that bromine (Br) has different chemical properties from krypton (Kr). The periodic table supports this hypothesis by indicating that – 1234567891011121314151617181920 21222324252627282930 1.bromine is a metal while krypton is a nonmetal 2.one mole of bromine is heavier than one mole of krypton 3.bromine and krypton are members of the same family 4.bromine and krypton have different numbers of valence electrons

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2009.38. 1234567891011121314151617181920 21222324252627282930 1.1 2.2 3.3 4.4

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2009.40. An example of a chemical property is — 1234567891011121314151617181920 21222324252627282930 1.Mass of a substance per unit volume 2.Ability to dissolve in solution 3.Point where solid becomes liquid 4.Tendency to undergo oxidation

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2009.48. Based on its position in the periodic table, the element sulfur would be expected to have how many valence electrons? 1234567891011121314151617181920 21222324252627282930 1.4 2.6 3.8 4.16

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