Questions from Previous Chemistry 115 Exams

Questions from Previous Chemistry 115 Exams - Questions...

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Questions from Previous Chemistry 115 Exams 1. Which of the following is the correct group number for the alkaline earth elements? a. 1A b. 2A c. 3A d. 6A e. 7A 2. Which of the following statements is not a part of Dalton’s atomic theory? a. Elements are composed of small particles called atoms. b. A given compound always has the same relative number and kind of different atoms. c. Chemical reactions do not change the identity of atoms. d. Atoms consist of positively charged protons, neutral neutrons, and negatively charged electrons. e. All atoms of an element are identical, different elements have different atoms. 3. Whose experiments led to the modern view of atomic structure, i.e. atoms contain a small, positively charged nucleus which is surrounded by electrons that fill most of the empty space around the nucleus? a. Thomson b. Rutherford c. Curie d. Dalton e. Einstein 4. How many neutrons does an atom of carbon-14 have? a. none b. 6 c. 7 d. 8
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e. 9 5. Which is the most stable ion of Be? a. Be -2 b. Be -1 c. Be d. Be +1 e. Be +2 6. Which is the correct name for FeO? a. Iron oxide b. Iron(II) oxide c. Iron(III) oxide d. Iron(I) ion e. Iron mono-oxygen 7. Which of the following is named incorrectly? a. OH - ; hydroxide ion b. NO 3 - ; nitrate ion c. HBr ; hydrobromic acid d. KCl ; phosphorous chloride e. H + ; hydrogen ion 8. Each of the following compounds are both molecular and empirical formulas except: a. H 2 O b. CH 4 c. P 4 d. Fe 2 O 3 e. H 2 SO 4 9. What is the charge of the stable sulfur anion? a. +1 b. +2 c. -1 d. -2 e. +6
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10. What is the correct formula for iron(III) sulfate? a. Fe 2 (SO 3 ) 3 b. FeSO 4 c. Fe 2 (SO 4 ) 3 d. Fe 3 (SO 4 ) 2 e. Fe 2 SO 4 11. A substance a. has definite composition and distinct properties. b. is always a compound. c. is a mixture of known composition. d. is the fundamental building block of matter. e. is composed of two or more compounds. 12. The group 2A elements are the a. alkali metals b. halogens c. alkaline earth metals d. noble metals e. chalcogens 13. Which of the following is not a ray produced by radioactivity? a. alpha rays b. beta rays c. gamma rays d. cathode rays 14. Cathode rays are a. beams of protons b. beams of electrons c. beams of neutrons d. beams of alpha particles e. beams of x-rays 15. Isotopes are atoms of the same element that differ in a. the number of neutrons
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the number of protons c. the number of electrons d. the atomic number 16. How many neutrons are in the Ar-40 atom? a. 18 b. 40 c. 22 d. 58 e. cannot be determined with the information provided. 17. All of the following are characteristics of metals except: a. ductile b. malleable c. good conductors of heat and electricity d. solids at room temperature e. tend to form anions 18. All of the following are empirical formulas except: a. CH 4 b. N 2 O 5 c. NH 3 d. P 4 O 10 e. H 2 O 19. The formula for the ionic compound composed of Ca 2+ and N 3- is: a. CaN b. Ca 2 N 3 c. Ca 3 N 2 d. Ca 2 N e. Ca 3 N 20. The NO
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This note was uploaded on 02/12/2011 for the course CHEM 112 taught by Professor Sttaf during the Spring '03 term at Arkansas Pine Bluff.

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Questions from Previous Chemistry 115 Exams - Questions...

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