How to Calculate Electronegativity Difference (ΔEN)
Classify chemical bonds from Pauling electronegativities:
Find Atom 1 Value
Input Pauling electronegativity value χ₁ for the first bonded atom.
Find Atom 2 Value
Input Pauling electronegativity value χ₂ for the second bonded atom.
Calculate ΔEN
Subtract smaller value from larger value: ΔEN = |χ₁ - χ₂|.
Determine Bond Type
Classify bond as nonpolar covalent, polar covalent, or ionic.
Key Features & Bond Thresholds
Pauling Scale Calibration
Standard Pauling scale references ranging from Francium (0.7) to Fluorine (3.98).
Hannay-Smyth Ionic Calculation
Estimates percentage ionic character based on dipole displacement.
Dipole Moment Direction
Identifies electron-rich partial negative (δ⁻) and partial positive (δ⁺) centers.
General Chemistry Guide: Electronegativity & Chemical Bonding
Electronegativity describes the relative tendency of an atom to attract electrons toward itself in a shared chemical bond. Linus Pauling established the most widely used scale where Fluorine is assigned 3.98.
The difference in electronegativity (ΔEN) determines whether electrons are shared equally (nonpolar covalent), shared unequally (polar covalent with dipole moment), or completely transferred from metal to nonmetal (ionic bond).
Frequently Asked Questions
?What is the cutoff between polar covalent and ionic bonds?
An electronegativity difference (ΔEN) of 1.7 corresponds roughly to 50% ionic character. ΔEN ≥ 1.7 is generally classified as ionic.