Name:_________________________________________  Period: _________________

 

Review Chemical Bonds

 

Study the diagram, which shows the formation of magnesium chloride and hydrogen fluoride. Then answer the questions.

 

 

 

 

 

  1. Which compound is formed by ionic bonding? Explain your answer.

 

 

 

 

 

 

 

  1. Which compound is formed by covalent bonding? Explain your answer.

 

 

 

  1. How many electrons are in the third energy level of a magnesium atom?

 

  1. Is the magnesium atom stable? What does the magnesium atom need to do to become stable?

 

 

  1. How many electrons are in the third energy level of a chloride atom?

 

 

  1. Is the chloride atom stable? What does the chloride atom need to do to become stable?

 

 

  1. Which atom forms an ion by the lost of electrons?

 

 

 

  1. Which atom forms an ion by the gain of an electron?

 

 

 

  1. Is the compound magnesium chloride stable? Explain your answer.

 

 

Write the type of substance described. Use these choices: compound, element.

 

 

____________ 1. H2O, a liquid that no longer resembles either hydrogen or oxygen gas

 

____________ 2. A substance that can be broken down in a chemical reaction

 

_____________3. Carbon, the substance represented by the symbol C

 

____________ 4. Sodium chloride (NaCl), commonly known as table salt

 

____________ 5. Gold, a substance that cannot be broken down further

 

 

Complete the table by checking the correct column(s) for each description.

 

Statement

Ionic bond(s)

Covalent bond(s)

6. An attractive force between two ions of opposite charge

 

 

7. Found in the compound NaCl

 

 

8. Increases the stability of atoms

 

 

9.Found in a molecule of water

 

 

10.Results in the formation of a molecule

 

 

11.Is formed when atoms share electrons

 

 

12. Found in most compounds that make up organisms