January 2017 Chemistry Regents #51-53

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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

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85  

 

 

 

 

 #51-53
  
51 Explain, in terms of electron configuration, why arsenic and antimony are chemically similar.

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same number of valence e-

[1] 52 Identify the element in Period 3 that is an unreactive gas at STP. [1]

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Ar or argon

53 Compare the energy of an electron in the first shell of a cadmium atom to the energy of an electron in the third shell of the same atom. [1]

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the electron in shell 3 has more energy

 

  

on to Questions 54-55
 

  

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

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85