Bond Length Calculator

Are you interested in calculating the distance between two atomic nuclei by knowing their covalent atomic radii and electronegativity? Here you can use this bond length calculator. I hope that my calculator will be a best one for you as per your requirement.

The distance measured between the nucleus of an atom and another with which that atom is bonded is called bond length. Nonetheless, it is an essential factor in molecular chemistry concerning the stability and the characters of molecules.

Tool Using Guide

Step	Action
Enter Covalent Radius (Atom A)	Input the covalent radius of Atom A (e.g., 70 pm).
Enter Covalent Radius (Atom B)	Input the covalent radius of Atom B (e.g., 110 pm).
Enter Electronegativity (Atom A)	Input the electronegativity of Atom A (e.g., 2.5).
Enter Electronegativity (Atom B)	Input the electronegativity of Atom B (e.g., 3.0).
Click Calculate	Displays the bond length result.

Input Examples

Example Type	Covalent Radius A	Covalent Radius B	Electronegativity A	Electronegativity B	Bond Length
Basic	70 pm	110 pm	2.5	3.0	179.96 pm
Advanced	70 pm	110 pm	2.5	3.5	179.91 pm

Bond Length Formula

To find the bond length between two atoms:

 $d_{A-B} = r_A + r_B - 0.09 \times |x_A - x_B|$

Variable	Description
$d_{A-B}$	Distance between nuclei of atoms A and B
$r_A$	Covalent radius of Atom A
$r_B$	Covalent radius of Atom B
$x_A$	Electronegativity of Atom A
$x_B$	Electronegativity of Atom B

Two Solved Examples

1. Basic Calculation Example

Step	Calculation
Covalent Radius (Atom A)	70 pm
Covalent Radius (Atom B)	110 pm
Electronegativity Difference	(
Multiply Difference	$0.09 \times 0.5 = 0.045$
Bond Length Calculation	$180 – 0.045 = 179.955$ pm

Answer: The bond length is approximately 179.96 pm.

More Calculators

2. Advanced Calculation Example

Step	Calculation
Covalent Radius (Atom A)	70 pm
Covalent Radius (Atom B)	110 pm
Electronegativity Difference	(
Multiply Difference	$0.09 \times 1.0 = 0.09$
Bond Length Calculation	$180 – 0.09 = 179.91$ pm

Answer: The adjusted bond length is approximately 179.91 pm.