CHM 1045
Dr. Michael Blaber

Name_________________________

SS #__________________________

Homework #2

  1. Given the following information write the chemical symbols for each element (2 points)

    2. Number of neutrons

    Number of electrons

    Number of protons

    Symbol

    19

    18

    16

     

    17

    15

    15

     

    25

    18

    20

     

    79

    54

    55

     
  2. Given the following ions, write the number of neutrons, electrons and protons (2 points)

    3. Ion

    Number of electrons

    Number of protons

    8Be2+

     

     

    131I-

     

     

    110Cs+

     

     

    18O2-

     

     
  3. Given the following structural formulas, write out the molecular and empirical formulas (2 points)

    4. Structural Formula

    Molecular Formula

    Empirical Formula

  4. What is the most likely chemical formula for an ionic compound involving the elements Calcium and Chlorine? (1 point)

 

 

5. Write the ionic charges for the ions in the following compound: Al2O3 (1 point)

 

 
  1. Give names for the following oxyanionic compounds (2 points)

HBrO

 

HBrO2

 

HBrO3

 

HBrO4