Answer
Br–Br < N–O < C–F < Ca–O < K–F
Work Step by Step
To rank the bonds in order of increasing ionic character, we look at the electronegativity difference between the atoms in each bond. The greater the difference, the more ionic the bond.
Electronegativity Values (Pauling scale)
N: 3.04
O: 3.44
C: 2.55
F: 3.98
Br: 2.96
Ca: 1.00
K: 0.82
Final Ranking (Increasing Ionic Character):
Br–Br < N–O < C–F < Ca–O < K–F
