June 2015  Chemistry Regents #31-35

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31 Which electron shell contains the valence electrons of a radium atom in the ground state?

(1) the sixth shell      (2) the second shell

(3) the seventh shell (4) the eighteenth shell

3 link 2-8-18-32-18-8

you needed to fill in the 2-8-

32 Each diagram below represents the nucleus of

an atom.  How many different elements are represented by the diagrams?

http://www.kentchemistry.com/RegentsExams/Jan_2015/regent2.gif

(1) 1   (3) 3

(2) 2   (4) 4
2 link protons determine the element

33 Chlorine and element X have similar chemical properties. An atom of element X could have an electron configuration of

(1) 2-2      (2) 2-8-1   (3)  2-8-8   (4) 2-8-18-7
4 link similar properties, same group

 

34 Which group of elements contains a metalloid?

(1) Group 8 (3) Group 16

(2) Group 2 (4) Group 18

3 link on the staircase

35 Which Lewis electron dot diagram represents a

fluoride ion.

http://www.kentchemistry.com/RegentsExams/Jan_2015/regent3.gif

 

1 link key term ion.....nonmetal ions get 8 dots and a negative charge

 

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 51-53 Questions 54-56 Questions 57-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-75  Questions 76-79  Questions 80-82  Questions 83-85

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