Quiz_Number_3_Fall_2010 (1)

Quiz_Number_3_Fall_2010 (1) - Exam Name_

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Exam Name___________________________________   MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.  1) 
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Which of  the  following  statement s are true? 
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1) 
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A) 
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The longer the  wavelength the higher the frequency.  B) 
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The higher the  frequency the shorter the wavelength.  C) 
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Ultraviolet  radiation has a higher energy per photon than infrared radiation.   D) 
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E) 
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  2) 
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How  would  you  describe  the typical  spectrum  of emitted  light  produced  by an  element  excited in  a flame. 
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2)  D Y o u   w o u l d   s ee  rai nb o of  co lo rs.  Li gh t is  absorbed by heated  elements so you would  not see anything. 
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You would see  one line of emitted light, but it would be different for each element.  D) 
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You would see  a series of very sharp lines of emitted light.  E) 
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none of the  above    3) 
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How does  Niels  Bohr's  quantum  explanatio n account  for the  observatio n of  atomic  spectra? 
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3)  E l e c t r o n s   c a n   o n l y   m ov in  di sc ret en er gy  st ep wi thi an  at o m.  El ect rons could not move in  an atom. 
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Only certain  photons with the correct energy can excite the electrons in an element.  D) 
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Any photon  could excite an electron.  E) 
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  4) 
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Which of  the  following  best  explains  what is  happening  when an  atom  emits  light? 
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4)  A n   e l e c t r o n   i s   j u m p i n g   f r o m   a   l o w   e n e r gy  st at to  hi gh  en er gy  st at wi th  th di ff er en ce  in  en er gy  be in co nv ert ed  to  lig ht.  A ele ctr on  is  dropping from a  higher to a lower  energy level with the  difference in energy  between the two being  emitted as light. 
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Heat energy is  converting a  neutron into a proton and an electron, which is ejected into the orbit of the nucleus, releasing light energy.  D) 
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Heat energy is  speeding up the orbit of the electrons and the resulting Doppler shift causes light to be emitted from the electrons.  E) 
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A proton is  undergoing a nuclear change in the nucleus and is emitting a high energy light wave in the process.    5) 
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Which of  the  following  elements  have a  valence of  3 (i.e.,  they are  likely to  seek to  form  three  bonds)? C, N, O,  F, Ne, Si,  P, S, Cl,  Ar, Ge,  As, Se,  Br, Kr  
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5)  C C ,   Si,  G O,  S, Se 
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N, P, As  D) 
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F, Cl, Br  E) 
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Ne, Ar, Kr    6) 
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When an  electron  makes a  transition  from the n  =  4 to the  =  2  hydrogen  atom  orbital,  the  energy  difference  between  these two  orbitals  (4.089 x  10 - 19  joules) is  given off 
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This note was uploaded on 12/26/2010 for the course CHM 1020 taught by Professor Miles during the Fall '10 term at University of Central Florida.

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Quiz_Number_3_Fall_2010 (1) - Exam Name_

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