Chemical Bonding Worksheet
Honors
Name______________________
Period
Date
Draw the following covalent bonds using Lewis Structures.
1. 2 Hydrogen atoms
5. 1 carbon and 2 Oxygen atoms
2. 2 Fluorine atoms
6. 2 hydrogen and 1 Oxygen atoms
3. 2 Oxygen atoms
7. 1 Hydrogen and 1 Chlorine atom
4. 2 Nitrogen atoms
8. 1 Phosphorus and 1 Nitrogen atom
The following atom will form ionic bonds. Draw the ionic bonds using Lewis structures.
9. Sodium and Chlorine
12. Strontium and Sulfur
10. Potassium and Bromine
13. Beryllium and Selenium
11. Magnesium and 2 Iodines
14. 2 Sodium and Sulfur
15. What are valence electrons?
16. According to the octet rule, how many valence electrons do atoms want?
17. Explain why atoms in the first group of the periodic table (Alkali Metals) are very reactive, but elements in the
last group of the periodic table (Noble Gases) are not at all reactive. Reactive means that the element is likely
to bond with other elements. (think about bonding, the octet rule, and valence electrons)
18. Draw the Lewis structure for Carbon below,
next to it write how many bonds it can make.
21. Draw the Lewis structure for Hydrogen below,
next to it write how many bonds it can make.
19. Draw the Lewis structure for Oxygen below,
next to it write how many bonds it can make.
22. Draw the Lewis structure for Sulfur below, next
to it write how many bonds it can make.
20. Draw the Lewis structure for Nitrogen below,
next to it write how many bonds it can make.
23. Draw the Lewis structure for Neon below, next
to it write how many bonds it can make.
24. How many valence electrons do the following atoms need to fulfill the octet rule?
d. Neon?
a. Hydrogen?
e. Lithium?
i.
b. Strontium?
c.
Selenium?
h. Gallium?
f.
Argon?
Tin?
g. Bromine?
25. Label the following as either an ionic (I) and or a covalent (C) bond. You will need to look up whether the
elements involved are metals or nonmetals
n. N2
a. CaCl2
o. NaI
b. CO2
p. NO2
c. H2O
q. Al2O3
d. BaCl2
r. FeCl3
e. O2
s. P2O5
f. NaF
t. N2O3
g. NaS
u. H2
h. S2
v. K2O
i. SO3
w. KI
j. LiBr
x. P4
k. MgO
y. CH4
l. C2H5OH
z. NaCl
m. HCl
Use the following statistics on how many pounds of each element are in the human body to find
the percentages of each element. Find the percentages by dividing the # pounds/ 150 pounds.
Then, multiply the number by 100%. Then create a bar graph using the percentages.
Element
Oxygen
Carbon
Hydrogen
Nitrogen
Calcium
Phosphorus
Potassium
Sulfur
Sodium
Chlorine
Magnesium
Iodine
Iron
# pounds
97
27
15
4.5
3
1.3
0.5
0.5
0.25
0.25
0.06
Trace
Trace
% of body
Less than 0.01%
Less than 0.01%
Elements in Your Body
70
60
50
40
30
20
10
0
Elements Found in the Human Body
The elements listed in the table below are found in your body. Fill in the information about each element using your Periodic Table of
Elements. Round the atomic mass to the nearest whole number.
Element
Oxygen
Carbon
Hydrogen
Nitrogen
Calcium
Phosphorus
Potassium
Sulfur
Sodium
Chlorine
Magnesium
Iodine
Iron
Symbol
Atomic #
Atomic Mass
Protons
Neutrons
Electrons
Bonding Basics - Covalent Bonds
Complete the chart for each element.
Element
# of Protons
Carbon
Chlorine
Hydrogen
Phosphorus
Oxygen
Sulfur
Nitrogen
Complete each covalent bond.
(1) Example of Lewis dot:
Hydrogen + Hydrogen
# of
Electrons
# of
Valence
Electrons
# of Electrons to Fill
Outer Shell
(2) Hydrogen + Oxygen
(3) Chlorine + Chlorine
(4) Oxygen + Oxygen
(5) Carbon + Oxygen
(6) Carbon + Hydrogen