Bond Order

Number of shared electron pairs between two atoms (1,2,3).

Short definition

Number of shared electron pairs between two atoms (1,2,3).

Full explanation

Bond Order in the context of chemical bonding: Number of shared electron pairs between two atoms (1,2,3). In practice this means relating macroscopic observation (mass, pressure, color), particle-level picture (atoms, electrons, ions moving and rearranging), and symbolic representation (formulas, equations, units). For Bond Order, students connect the definition to linked lessons: do not just memorize the phrase — predict what changes when conditions change and check with dimensional analysis.

Notation and units

• Notation: —
• Common units: SI or derived, temperature in kelvins when in gas/energy contexts.
• Symbolic hint: Lewis structures and line-angle formulas

Example

Example for bond order: In a worked problem where this term appears, substitute measured values with correct units and check that the dimensional result matches the intended quantity. For instance, calculating a bond order often uses the form $n=m/M$ or $c=n/V$ or $PV=nRT$ with $T$ in kelvins — illustrating how bond order leads to a numerically different but dimensionally correct result when units are handled.

Confused with

• Bond Energy — distinction: Bond Order is number of shared electron pairs between two atoms (1,2,3). while Bond Energy has a different defining property. See cross-link in glossary.

Related resources

• Topic: chemical-bonding
• Formula library — when a specific equation involves this term it is linked.
• Constants — if a constant is required, it is sourced and versioned (NIST 2022).

Sources

• NIST Physical Constants 2022 (nist-2022, CODATA 2022). Accessed 2026-08-21.

Last reviewed: 2026-08-21 — Review due: 2027-08-21 — Author: Chemistry Fundamentals Editorial Team — Reviewer: Editorial Review Board (transparent placeholder).

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