Problem Set 7: Bonding
1) Define the following: ionic bond, covalent bond, polar covalent bond.
An ionic bond is the electrostatic attraction between a cation and an anion following a
complete electron transfer from a metal to a nonmetal.
A covalent bond is equal electron sharing between two bonded atoms.
A polar covalent bond is unequal electron sharing between two bonded atoms.
2) Use the electronegativity difference to determine the type of bond that would form
between each pair of atoms listed.
Cobalt and bromine, ΔEN = 0.9, polar covalent.
Nickel and oxygen, ΔEN = 1.6, polar covalent.
Sodium and fluoride, ΔEN = 3.1, ionic.
Hydrogen and oxygen, ΔEN = 1.4, polar covalent.
Carbon and hydrogen, ΔEN = 0.4, covalent.
3) Draw the following Lewis structures.
a) CH3OH, 14 valence electrons
b) CH2O, 12 valence electrons
