Answer
a) ionic
b) polar covalent
c) ionic
d) nonpolar covalent
e) polar covalent
Work Step by Step
a) Bond between a metal ($K$) and a nonmetal ($O$) is ionic.
b) Bond between two nonmetals with different electronegativity is polar covalent.
c) Bond between a metal ($Na$) and a nonmetal ($H$) is ionic.
d) Bond between two nonmetals with the same electronegativity is nonpolar covalent.
e) Bond between two nonmetals with different electronegativity is polar covalent.
