What this calculator does
Percent ionic character works out ionic character of a bond estimated from the electronegativity difference. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaI = 100 × (1 − e^(−(Δχ/2)²))
The inputs explained
| Field | What to enter |
|---|---|
| Electronegativity of atom A | A number. Starts at 3.16. |
| Electronegativity of atom B | A number. Starts at 2.2. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with electronegativity of atom a
Every other input is held at the calculator’s starting values while electronegativity of atom a varies. Select any row to load that scenario into the calculator.
How the answer changes with electronegativity of atom a