Question

electronegativity values:
k: 0.8
h: 2.1
br: 2.8
cl: 3.0
o: 3.5
f: 4.0
k-cl
h-cl
h-br
o-f

Explanation:

Step1: Calculate electronegativity difference for K - Cl

The electronegativity of K is 0.8 and of Cl is 3.0. The difference is \(|3.0 - 0.8|=2.2\)

Step2: Calculate electronegativity difference for H - Cl

The electronegativity of H is 2.1 and of Cl is 3.0. The difference is \(|3.0 - 2.1| = 0.9\)

Step3: Calculate electronegativity difference for H - Br

The electronegativity of H is 2.1 and of Br is 2.8. The difference is \(|2.8 - 2.1|=0.7\)

Step4: Calculate electronegativity difference for O - F

The electronegativity of O is 3.5 and of F is 4.0. The difference is \(|4.0 - 3.5| = 0.5\)

Answer:

K - Cl