old_2nd_exam-w09 - Chemistry 1B SECOND MIDTERM EXAM (Closed...

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Chemistry 1B SECOND MIDTERM EXAM Summer 2007 ( Closed Book) Page 1 Name:__________________________________ Student Number:______________ This is a closed book examination. If you are not sure about the meaning of a question please do not hesitate to ask for clarification. Show all your work and include all appropriate units in your answers. You may use a calculator. If more space is needed for your answers use the reverse side of the page, but please indicate that the question continues on the reverse! * Mark all pages with your name. Include in the box below your TA's name. DATA needed for this exam is provided on page 4. Score: 1. (24) 2. (15) 3. (20) 4. (16) 5. (24) 6. (20) 7. (31) Total _________(max 150 pts) 1-Indicate whether the following statements are true or false. If true briefly justify your answer (20 words or less) . If false explain why and write a true statement that applies to the case. a-(6pts) The electron affinity is the energy change accompanying the addition of one mole of electrons to one mole of positive ions of an element. b-(6pts) The non metals and metalloids largely dominate numerically among the atoms in the periodic table c- (6pts)-According to VSEPR theory, a molecule with the general formula AX 3 E will have a
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old_2nd_exam-w09 - Chemistry 1B SECOND MIDTERM EXAM (Closed...

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