Correctly complete the following statements.

1.  The energy needed to remove an electron from an atom is called its __________________
     energy.

2.   A (n) _______________ bond involves the sharing
      of electrons between atoms.

3.  A (n) ______________ bond involves the transfer of electrons between atoms.

4.  A filled outer valence of an atom is called a(n) ___________________.
 

Multiple Choice Section

Correctly complete the following statements or answer the following questions.

1.  A bond formed by two pairs of shared electrons between atoms is called a(n)
     (1.) single covalent bond  (2.) single ionic bond  (3.) double covalent bond  (4.) double ionic bond

2. The transfer of valence electrons between atoms results in a(n)
     (1.) ionic bond  (2.) covalent bond  (3.) mixture  (4.) molecular compound

3. Describe the charge on a Na+ ion.   (1.) positive 1  (2.) negative 1  (3.) positive 2
    (4.) negative 2

4. Ionic compounds  (1.) are held together with covalent bonds
    (2.) are also called molecular compounds  (3.) conduct electricity when dissolved in water
    (4.) may be liquids or gases at room temperature

5. Which is most likely an ionic compound?   (1.) water   (2.) carbon dioxide
     (3.) sodium fluoride  (4.) ammonia

6. Covalent bonds   (1.) have shared electrons  (2.) are always nonpolar
    (3.) are always polar   (4.) form ionic compounds

7.  Which type of bonding is often associated with "a sea of mobile electrons"?
     (1.) covalent  (2.) ionic  (3.) metallic

8.  The tendency of an atom to attract electrons is called its  (1.) oxidation state
     (2.)  electron dot diagram   (3.) ionization energy  (4.) electronegativity

9.  An ionic bond would most likely be formed between   (1.) two metals  (2.) two nonmetals
     (3.) two metalloids  (4.) a metal and a nonmetal
 

True/False Section:

Indicate whether each statement that follows is true or false.

1.   Oxidation number is positive if electrons are gained and negative if they are lost.

2.   All atoms want to have a filled octet if possible.

3.   Metals tend to have a much higher electronegativity than nonmetals.

4.   The formation of bonds requires energy to be absorbed.

5.   Energy is released when bonds are broken.  This release of energy creates a more stable condition.

6.  The noble gases have filled octets and therefore have by far the highest ionization energies.

7.   Ionic substances tend to have high melting points due to the strong attraction of the opposite
      charges within them.

8.   Ionic substances tend to be poor conductors within solution.

Short Answer Section

***  Predict the most probable oxidation number for each of the following elements:  (1 pt. each)

1.  aluminum (3 valence electrons)

2.  oxygen (6 valence electrons)

3.  potassium (1 valence electron)

4.  argon (8 valence electrons)

5.  beryllium (2 valence electrons)

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