Compare and contrast the properties of the elements oxygen and carbon.

 

Nitrogen occurs in nature as a diatomic molecule—two atoms of nitrogen joined together. Draw the electron dot structure for than molecule. What kind of bond joins the atoms?

 

 

Look at each of the electron dot structures shown below. In each case, decide: how many valence electrons are present; whether or not the particle is reactive; and if it is reactive, what it could do to become part of a stable compound and what kind of bond it would form in the process.

 

   ..

:Ne:

 ··

 

     .. 

[:Br:]^-

  ··

 

   .

·C·

 ·

 

   .

·N:

 ·

 

Listed below are some imaginary data for a series of compounds. Based on what you have learned, predict whether each compound is probably ionic (I) or covalent (C). If the information given might apply to either kind of compound, put a question mark (?).

 

                        Is a gas at room temperature.

 

                        When melted, conducts an electric current well.

 

                        Is composed of a metal and a nonmetal.

 

                        When dissolved in water, does not conduct an electric current.