Problem: Determine whether a bond between each pair of atoms would be pure covalent, polar covalent, or ionic.a. Br and Brb. C and Clc. C and Sd) Sr and O

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Electronegativity Difference        

              (ΔEN)                                     Bond Classification
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Zero (0.0)                                          Pure Covalent
Small (0.1 – 0.4)                                Nonpolar Covalent
Intermediate (0.4  – 1.7)                    Polar Covalent
Large (Greater than 1.7)                  Ionic               


a. Br and Br

ΔEN = 2.8 – 2.8
ΔEN = 1.2
ΔEN (0) → Pure Covalent


b. C and Cl

ΔEN = 2.5 – 3.0
ΔEN = 0.5
ΔEN (0.5) between 0.4 – 1.7 → Polar Covalent


c. C and S

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Problem Details

Determine whether a bond between each pair of atoms would be pure covalent, polar covalent, or ionic.

a. Br and Br

b. C and Cl

c. C and S

d) Sr and O

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