Bonding Types Wksht #55
Text reference pgs 151-152, 161-163
Name ________________________
Vocabulary: electronegativity, chemical bond, ionic bonding, covalent bonding, polar-covalent bond, nonpolar, polar
Summary: An atoms ability to attract shared pairs of electrons in a bond is quantified and how atoms connect to each
other is discussed. The three types of bonding are defined showing how the electronegativity differences between
the bonding atoms determines the type of bonding.
1. What is electronegativity?
2. Why is fluorine special in terms of electronegativity?
3. Without looking at the electronegativity table, which of the following element has the greatest electronegativity?
The smallest electronegativity?
Ba, As, P, S, O, Br
greatest electronegativity__________
smallest electronegativity __________
4. In general, what two types of elements form an ionic bond?
5. Give 3 examples of molecules that contain purely covalent bonding. _______________________
What is the electronegativity difference between atoms of this type of bonding?
6. What is the percent ionic character of a bond when the 2 atoms have an electronegativity difference of 1.7?
7. What is a polar covalent bond? Give an example.
8. Fill in the following table. Use ionic, covalent or polar covalent for bond type.
bonded atoms
Ca, Cl
electronegativity
difference
bond type
more negative atom
Fe, F
P, O
I, I
Si, H
S, F
Na, Br
9. Which one of the above bonds (question 8) has the greatest ionic character? __________
10. Which one of the above bonds (question 8) has the least ionic character? __________
11. Which of the above bonds (question 8) are also called nonpolar covalent bonds? _________________________