fall08ex1

fall08ex1 - CHEM 25: EXAM #1 02. OCTOBER 2008 Name _ Please...

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1 CHEM 25: EXAM #1 02. OCTOBER 2008 Name ___________________________ Please check the studio to which you are assigned: _____ Mon PM _____ Tues AM _____ Thurs AM _____Fri PM _____ Tues PM _____ Thurs PM This exam must be completed without the aid of books, notes or colleagues. You may use a non-programmable calculator; if your calculator is programmable, you must present it to a TA and have it cleared before you begin the exam. All answers must be clearly written in the space indicated and mathematical work must be shown for full credit to be awarded for numerical answers and for all answers for which calculations are carried out . Please write your name on the top of each page. A periodic chart is included as the last page of the exam. Good luck … And remember: “In the beginner’s mind there are many possibilities, in the experts mind there are few.” --- Shunro Suzuki (1870-1966)
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2 NAME:___________________________ Part I. Multiple choice: Clearly circle the TRUE answer(s) (MORE THAN ONE ANSWER CAN BE RIGHT) for each of the following questions (2 pts ea.). Total points: 40 1.Which of the following is untrue for matter? A) It has a mass. B) It occupies space. C) It cannot be converted from one form into the other. D) It can neither be created not destroyed 2. Which of the following are chemical properties of hydrochloric acid? A) It is a liquid. B) It dissolves Zn C) It can be neutralized with base D) None of these 3. Which statements are in accordance with Rutherford's atom model? A) The atoms are a homogeneous positively charged mass. B) The atoms are consist of a small positive nucleus in which almost all the mass is concentrated C) The electrons have almost no mass compared to the nucleus and move in orbits around the nucleus. D) None of the above 4. The mass number of an isotope represents A) The sum of the protons and neutrons B) The number of the protons C) The number of neutrons. D) The sum of the protons, neutrons, and electrons. 5. What is true for elements of the same group in the periodic table of the elements? A) They have the similar chemical and physical properties
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fall08ex1 - CHEM 25: EXAM #1 02. OCTOBER 2008 Name _ Please...

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