Answer choices are directly under each question. Just List out your solution. a)

Question

Answer choices are directly under each question. Just List out your solution.

a)  The maximum degree of crystallinity in a typical polymer is:

                   0%              60%            100%

          b)  Which typically negatively influences thermal conductivity in                    metals to a greater extent:

                   Impurities             Temperature                  Both about equal

          c)  a pentagon has how many mirror planes of symmetry

                   one                       five                       none

          d)  A triangular object which is white on one side and black on the

     other (top and bottom faces) has which rotational axes:

                   two-fold               three-fold              both

          e)  A carbon-carbon double bond can rotate

                   easily          with great difficulty       varies with the molecule

          f)  Chlorine has how many valence electrons

                     5                         7                           8

          g)  Why are transition metal ions typically colored:

                   close spacing of valence orbitals    

                   high energy state of valance orbitals

                   mother nature likes pretty colors

          h)  In going from gas to solid to the entropy of a material

                   increases     decreases    is about the same

i)  A cube has how many centers of symmetry inversion:

                   none                     one                       an infinite number

          j)  A hexagon has how many two-fold axes of rotational symmetry:

                   one                       four                      six

          k)  A carbon-carbon double bond is approximately how much stronger

               than a carbon-carbon single bond:

                   not stronger/the same    2 times        1.5 times

          l)  Sr (Sr) has how many valence electrons

                     2                         8                           29

Explanation / Answer

a) 100% b) impurities c) five d) both e) with great difficulty f) 7 g) high energy state of valance orbitals h) decreases i) an infinite number j) six k) 1.5 times l) 2

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