June 2015 Chemistry Regents #31-35
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Questions | Answer | Links | Explanations |
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? (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 |
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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.
| 1 | link | key term ion.....nonmetal ions get 8 dots and a negative charge |
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