January 2014 Chemistry Regents #51-54

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

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Questions

 

 

Base your answers to questions 51 through 54 on the information below and on your knowledge of chemistry.


The diagram below represents three elements in Group 13 and three elements in
Period 3 and their relative positions on the Periodic Table.

Some elements in the solid phase exist in different forms that vary in their physical
properties. For example, at room temperature, red phosphorus has a density of 2.16 g/cm3 and white phosphorus has a density of 1.823 g/cm3.


51 Identify the element from the diagram that will react with chlorine to form a compound with the general formula XCl4. [1]

Answer-->             Silicon


52 Consider the Period 3 elements in the diagram in order of increasing atomic number. State the trend in electronegativity for these elements. [1]

Answer-->    As atomic number increases, the electronegativity increases.


53 Compare the number of atoms per cubic centimeter in red phosphorus with the number of atoms per cubic centimeter in white phosphorus. [1]

Answer--> Red has more, or white has less


54 Identify one element from the diagram that will combine with phosphorus in the same ratio of atoms as the ratio in aluminum phosphide. [1]

Answer--> ReGallium or Indium

 

 

 
 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

 

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