Answers to Self Quiz

1. Draw an electron dot diagram for H₂O. What is represented by each portion of the diagram?

2. Metallic bonding involves:

** c. atoms sharing very loosely held electrons

 

3. What is the correct formula for nitrogen? What is represented by each of the incorrect answers?

a. N₃ - formula for a molecule containing 3 N atoms, but nitrogen is diatomic

b. N² - the "2" should be a subscript, unless it is a charge, then it should have a "+" or "-"

c. N - symbol for (an atom of) nitrogen

**d. N₂ - correct

e. N^3- - formula for nitride ion

4. What is the bond type and formula of the compound formed by sodium and oxygen?

ionic, Na₂O

5. How many electrons are there in a single bond?

**c. 2

6. Bonding between Si and O will result in:

**b. a network material

7. What is the bond type and formula of the compound you would expect to form between nitrogen and chlorine?

covalent, NCl₃

8. According to the octet rule, atoms want to:

**d. end up with eight valence electrons

9. When dealing with polyatomic ions, covalent bonding is the attraction that holds:

**b. one atom to another in an ion

10. Mg and O would be held together by:

**a. ionic bonding

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E-mail instructor: Eden Francis

Clackamas Community College
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