Question

Which pair of atoms forms the most polar bond?

Si and F

P and Cl

Si and Cl

P and F

An oxidant is a substance that can accept the electrons from another reagent. Use electronegativity values to determine which one of the following elements is a good oxidant.

F

Li

Ni

Answer 1

Si and F

The electronegativity difference between Si and F is = 4-1.9 = 2.1

P and Cl

The electronegativity difference between P and cl is = 3-2.2 = 0.8

Si and Cl

The electronegativity difference between Si and cl is   = 3-1.9 = 1.1

P and F

The electronegativity difference between P and Fis   = 4-2.2 = 1.8

The more electonegativity difference bond is morepolar = Si and F is more polar bond

Si and F >>>> answer

The long form of periodic table more electronegativity element id F . So it is good oxidising agent.