January 2018 Chemistry Regents #55-56

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85  

 

 

 

 

 #55-56
  

The bright-line spectra for four elements and a mixture of elements are shown in the diagram below.

55 Write the letter of each element present in the mixture. [1]

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A and D

56 Explain, in terms of electrons and energy states, how the light emitted by excited atoms is produced. [1]

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Excited electrons emit energy in the form of light as they return to lower electron shells

 

  

on to Questions 57-59

  

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85