REVIEW and REINFORCEMENT Covalent Bonds .......... KEY ...

Name Class ¯ Date
REVIEW and REINFORCEMENT
Covalent Bonds
.......... KEY CONCEPTS~
In covalent bonding, the positively charged nucleus of each atom
simultaneously attracts the negatively charged electrons that are
shared.
Section
7-3
Building Vocabulary Skills: Good Examples
Give an example of each of the following, Some of your examples should be
expressed as drawings or formulas; others should be words.
1. covalent bonding
electron-dot diagram
3. diatomic element
4. molecule
5. network solid
6. polyatomic ion
@ Prentice-Hall, Inc. 23
~

[] ~orming Covalent Bonds: Applying the Main Ideas
Examine the atoms in the following diagrams. Then answer the questions that
follow.
1. Draw electron dot formulas to show how atom A forms compounds with atoms B through
E (Hint: You will need to use more than one atom A to form some compounds.)
2. Which of these atoms’form diatomic molecules? Write the molecular formulas for these
molecules.
3. Several of these atoms form polyatomic ions. Draw an electron dot formula for at least
one of these ions and name the ion.
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