SUB PLANS:
Calculating types of bonds using electronegativity chart
Dr. B
Use the following websites to complete this worksheet.
http://www.tutorhomework.com/Chemistry_Help/electronegativity_table/electronegativity.html
http://www.chem.wisc.edu/deptfiles/genchem/sstutorial/Text7/Tx71/tx71.ht
ml
http://www.faculty.sfasu.edu/dubenaj/che111/4_6%20Electronegativity%20an
d%20Bond%20Polarity.pdf
Review and Remember: To calculate the type of bond, you must first calculate
the difference in electronegativity of the atoms involved in the bond.
If the difference is less than .5, it is nonpolar covalent
If the difference is between .5 and 1.7, it is polar covalent
If the difference is over 1.7, it is ionic.
1. Why does this make sense?
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SUB PLANS:
Calculating types of bonds using electronegativity chart
Dr. B
Worksheet – Bonding Types
1. Using only the Periodic Table and the above website, arrange the following elements in order
of increasing electronegativity.
Rb, Na, Li
_______________
b. P, S, Al
_______________
c. Fe, As, Br
_______________
a.
2. Label “i” (ionic) or “c” (covalent) the bonds in the following compounds.
a. CO2 __________________________
e. CaO __________
b. Na2O __________________
f. Na2CO3 (be careful)
c. SF2 _____________________
____________
d. N2O __________
3. Calculate and group the following bonds in order of increasing ionic character. SHOW
YOUR WORK BELOW.
a. C-Cl NaCl Cl-Cl
__________________________________________
b. N-F
O-F C-F
__________________________________________
c. C-F
N-O Si-F
___________________________________________
d. H-Cl B-Cl S-Cl
____________________________________________
WORK:
A.
B.
C.
SUB PLANS:
Calculating types of bonds using electronegativity chart
Dr. B
D.
4. Consider the bonds between the following pairs of elements: Mg and O, C and O, O and O,
Si and O, N and O.
a.
b.
c.
Which one would be the most polar, covalent bond? ________________
Which one would be the least polar (but still polar) covalent bond? ___________
Describe the other three bonds.
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5. Determine whether the molecule (or compound) is ionic, polar covalent, or nonpolar covalent. If
polar covalent be sure to assign the correct partial charge ( + or - ) to each element. SHOW ALL
WORK.
a.
N2
b.
HF
c.
CO
d.
NaCl
e.
MgO
f.
AlCl3
SUB PLANS:
g.
CH4
h.
NF3
i.
CS2
j.
CCl4
k.
SO3
Calculating types of bonds using electronegativity chart
Dr. B