June 2017 Chemistry Regents #54-57

Highlight to reveal answers and explanations

 

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 54-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-76  Questions 77-80  Questions 81-82  Questions 83-85 

 

Other Regents Exams

Questions 54-57

 

 

Base your answers to questions 54 to 57 on the information below and on your knowledge of chemistry.

The diagrams below represent four different atomic nuclei.

54 Identify the element that has atomic nuclei represented by nucleus l. [1]

Answer-->     Fluorine

55 Determine the mass number of the nuclide represented by nucleus 2. [1]

Answer-->       18

56 Explain why nucleus 2 and nucleus 4 represent the nuclei of two different isotopes of the same element.[1]

Answer-->       Same number of protons different number of neutrons

57 Identify the nucleus above that is found in an atom that has a stable valence electron configuration. [1]

Answer-->     Nucleus 3 or Neon

 

on to Questions 58-60

 

 

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 54-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-76  Questions 77-80  Questions 81-82  Questions 83-85 

 

Back to Regents Exams