Double Bond

Covalent bond with two shared pairs (one σ, one π).

Short definition

Covalent bond with two shared pairs (one σ, one π).

Full explanation

Double Bond in the context of chemical bonding: Covalent bond with two shared pairs (one σ, one π). 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 Double Bond, 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 double bond: 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 double bond often uses the form $n=m/M$ or $c=n/V$ or $PV=nRT$ with $T$ in kelvins — illustrating how double bond leads to a numerically different but dimensionally correct result when units are handled.

Confused with

• Triple Bond — distinction: Double Bond is covalent bond with two shared pairs (one σ, one π). while Triple Bond 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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