June 2016 Chemistry Regents #82-85

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Question 51 Questions 52-53 Questions 54-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69  Questions 70-71  Questions 72-74  Questions 75-77  Questions 78-81  Questions 82-85

 

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Question 82-85

 

 

Base your answers to questions 82 through 85 on the information below and on your knowledge of chemistry.

In 1896, Antoine H. Becquerel discovered that a uranium compound could expose a photographic plate wrapped in heavy paper in the absence of light. It was shown that the uranium compound was spontaneously releasing particles and high-energy radiation. Further tests showed the emissions from the uranium that exposed the photographic plate were not deflected by charged plates.

82 Identify the highly penetrating radioactive emission that exposed the photographic plates. [I]

Answer---> gamma ray

83 Complete the nuclear equation in your answer booklet for the alpha decay of U-238. [I]

238U
92
==>
4He
2
+______________

 

Answer--->

 

234Th
90

84 Determine the number of neutrons in an atom of U-233. [1]

Answer--->    141

85 Identify the type of nuclear reaction that occurs when an alpha or a beta particle is spontaneously emitted by a radioactive isotope. [1]

Answer---> transmutation, natural decay, nuclear decay

 

NOT fission or fusion

Conversion Table June 2016

raw score (out of 85)scale score (your grade)
74 85
5065

 

Other Regents Exams

 

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 Questions 52-53 Questions 54-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69  Questions 70-71  Questions 72-74  Questions 75-77  Questions 78-81  Questions 82-85

 

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