121quiz5Rpracticeans

121quiz5Rpracticeans - e) both more efficient than that by...

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Practice Quiz 5 (Thursday) Dr. Heyns Chemistry 121 Week of Autumn Quarter 2006 November 9, 2006 Time: 20 min Points: 30 Name of student:__________________________________ Name of TA:______________________________________ 1. (5 pts) In general, as you go across a period in the periodic table from left to right: (1) the atomic radius __________; (2) the electron affinity becomes __________ negative; and (3) the first ionization energy __________. a) decreases, decreasingly, increases b) increases, increasingly, decreases c) increases, increasingly, increases d) decreases, increasingly, increases e) decreases, increasingly, decreases 2. (5 pts) Screening by the valence electrons in atoms is __________. a) less efficient than that by core electrons b) more efficient than that by core electrons c) essentially identical to that by core electrons d) responsible for a general increase in atomic radius going across a period
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Unformatted text preview: e) both more efficient than that by core electrons and responsible for a general increase in atomic radius going across a period 3. (5 pts) Of the following elements, which has the largest first ionization energy? a) Na b) Al c) Se d) Cl e) Br 1 4. (5 pts) Which of the following has the largest second ionization energy? a) Ca b) K c) Ga d) Ge e) Se 5. (5 pts) Which one of the following is not true about the alkali metals? a) They are low density solids at room temperature. b) They all readily form ions with a +1 charge. c) They all have 2 electrons in their valence shells. d) They are very reactive elements. e) They have the lowest first ionization energies of the elements. 6. (5 pts) Element M reacts with chlorine to form a compound with the formula 2 MCl . Element M is more reactive than magnesium and has a smaller radius than barium. This element is __________. a) Sr b) K c) Na d) Ra e) Be 2...
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121quiz5Rpracticeans - e) both more efficient than that by...

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