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Past Exam for CHEM 1035 - General Chemistry at Virginia Tech (VT)

Exam Information

Material Type:Exam 3
Professor:Staff
Class:CHEM 1035 - General Chemistry
Subject:Chemistry
University:Virginia Polytechnic Institute And State University
Term:Fall 2005
Keywords:
  • Electron Dots
  • Electronegativity
  • Bond Energy
  • Bond Length
  • Polar Bonds
  • Arrangement
  • Lewis Structure
  • Lattice Energy
  • Configuration
  • Exothermic Reaction
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Sample Document Text

Chemistry 1035 Test 3 November 3, 2005 THIS IS FORM A [FORM B #s in ( )] Name ------------------------ ALL LEWIS STRUCTURES ARE DRAWN AT THE END OF THE TEST. LOOK AT THE LEWIS STRUCTURES TO FOLLOW THE SOLUTION TO EACH QUESTION. 1. (3)Which of the following elements is most likely to form a cation by the loss of three electrons? 1. K 2. Ca 3. Sc 4. N Answer: 3. Sc Some atoms lose electrons, becoming positively charged ions - cations. Atoms that lose electrons will lose the number of electrons required to obtain a noble gas configuration. The elements that lose electrons to obtain a noble gas configuration are metals. Nonmetals gain electrons to form negatively charged ions, anions, in order to obtain a noble gas configuration. K: [Ar]4S1 K will lose the 4S1 electron to form K+ which has a noble gas configuration. Ca: [Ar ]4s 2 Ca wi11lose the two 4s2 electrons to from Ca 2 + which has a noble gas configuration. Sc: [Ar]4s 2 3d 1 Sc will lose three electrons - 4s 2 3...

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