Name __________________________________________ Period _______ Date _____________________
Honors: Chemical Bonds Study Guide
Chapters 7-9
1. Below is a Bohr’s Model of Lithium Fluoride. When Lithium and Fluorine bind Lithium loses an electron
and Fluorine gains one.
a)
b)
c)
d)
What charge is Lithium? _____________
What charge is Fluorine? ___________
Which electrons were involved in this bond?_______________
Why did Fluorine gain one electron? ____________________
2. Two or more substances that are physically blended but are not chemically bonded are called
______________.
3. List the correct method of separating the following mixtures.
a. Iron filings and sulfur _______________________________________
b. Salt and water _____________________________________________
c. Sand and water ____________________________________________
4. Which one of the choices above is a solution (homogenous mixture)? ________________________
5. Identify whether the following characteristics are related to ionic or covalent bonds.
a)
b)
c)
d)
e)
Takes place between 2 nonmetals ________________________________
Electrons are transferred _______________________________________
Electrons are charged (+/-) _____________________________________
Electrons are shared ___________________________________________
Takes place between metal and nonmetal __________________________
6. Does the following formula follow the law of conservation of mass? Why or why not?
Show your work here!
_______________________________________________________________________
7. Create an ionic bond for the following:
a) Boron + 3 Chlorine
Calcium + 2 Fluorine
8. Create a covalent bond for the following
a) Carbon + 4 Hydrogen
Sulfur + Sulfur
9. Identify the following as either physical or chemical changes
a. gasoline burning ____________________________
b. whipping egg whites ____________________________
c. dissolving sugar in coffee ____________________________
d. milk souring (sour-tasting lactic acid is produced) __________________
e. Iron rusting ____________________________
f. Formation of bubbles ___________________________
10. Label the pH scale below with the following labels: acids, bases, and neutral.
11. A) Define Endothermic Change __________________________________________________________
B) What happens to the temperature in an endothermic reaction? _________________
12. A) Define Exothermic Change ___________________________________________________________
B) What happens to the temperature in an exothermic reaction? ___________________
13. The last known Tasmanian tiger died at Hobart Zoo on Sept. 7, 1936. Since then Tasmanian tigers have
been _____________________________.
14. What are some factors which may cause animals to become extinct?
_______________________________________________________________________
15. Webbed feet are a(n) __________________ for ducks because it allows them to swim.
16. Adaptations allow animals to be able to ______________________________________.
Balance the following equations.
17. K + Cl2
18. NaF + Br2
KCl
NaBr + F2