Question

given their electronegativity values, which pair of atoms could form a covalent bond?
a. o (3.5) and cl (3.0)
b. mg (1.2) and o (3.5)
c. f (4.0) and li (1.0)
d. al (1.5) and f (4.0)

Explanation:

Step1: Calculate electronegativity difference for each pair

For pair A: \(|3.5 - 3.0|= 0.5\)
For pair B: \(|3.5 - 1.2| = 2.3\)
For pair C: \(|4.0 - 1.0|=3.0\)
For pair D: \(|4.0 - 1.5| = 2.5\)

Step2: Determine covalent bond based on electronegativity difference

A covalent bond is formed when the electronegativity difference (\(\Delta\chi\)) between two atoms is \(\Delta\chi<2\).

Answer:

A. O (3.5) and Cl (3.0)