January 2013 Chemistry Regents #55-58

Highlight to reveal answers and explanations

 

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

Questions 51 Questions 52-54 Questions 55-58 Questions 59-61 Questions 62-65 Questions 66-69

Questions 70-72 Questions 73-76 Questions 77-79 Questions 80-82 Questions 83-85

Other Regents Exams

Questions

 

 

Base your answers to questions 55 through 58 on the information below.

The atomic number and corresponding atomic radius of the Period 3 elements are

shown in the data table below.

55 On the grid in your answer booklet, mark an appropriate scale on the axis labeled  “Atomic Radius (pm).” [1]

56 On the grid in your answer booklet, plot the data from the data table. Circle and  connect the points. [1]

Link to Answers for Questions 55 and 56

57 State the general relationship between the atomic number and the atomic radius for the Period 3 elements. [1]

HIGHLIGHT TO SEE THE ANSWER

As atomic number increases, there is a decrease in atomic radius.

58 Explain, in terms of electrons, the change in radius when a sodium atom becomes a  sodium ion. [1]

HIGHLIGHT TO SEE THE ANSWER

The radius of a sodium ion is smaller because the sodium atom lost one electron.

An Na ion is smaller because it has one fewer electron shell.

Next Questions

 

 
 

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

Questions 51 Questions 52-54 Questions 55-58 Questions 59-61 Questions 62-65 Questions 66-69

Questions 70-72 Questions 73-76 Questions 77-79 Questions 80-82 Questions 83-85

 

Back to Regents Exams