B

Binary Compound

AₓBᵧ (e.g., NaCl, MgO, CO₂)
Quick Reference
Formula / NotationAₓBᵧ (e.g., NaCl, MgO, CO₂)
Also Known AsTwo-element compound, diatomic compound (if molecular with 2 atoms), binary salt

What is Binary Compound?

A binary compound is a chemical compound consisting of exactly two different elements, though not necessarily in a 1:1 ratio. Examples include sodium chloride (NaCl), water (H₂O), sulfur dioxide (SO₂), and iron(III) oxide (Fe₂O₃). Binary compounds can be ionic or covalent depending on the elements involved.

Formula & Notation

AₓBᵧ (e.g., NaCl, MgO, CO₂)

Other Names / Synonyms: Two-element compound, diatomic compound (if molecular with 2 atoms), binary salt

Properties & Characteristics

A binary compound is a chemical compound composed of exactly two different elements in fixed stoichiometric ratios. Binary compounds can be ionic (NaCl, MgO), covalent (CO₂, H₂O), or metallic (Fe₃C). They are named systematically: metal + nonmetal (ionic) or IUPAC prefix system (covalent). The oxidation states of both elements are constrained by the compound's formula.

Uses & Applications

Binary compounds are foundational in chemistry and industry. Common examples: NaCl (food, chemical industry), H₂O (universal solvent), SiO₂ (glass, semiconductors), NH₃ (fertilisers), TiO₂ (pigments, photocatalysis). Many binary compounds are first synthesised in students' laboratory courses.

Safety Information

Hazards vary enormously: water is safe, while hydrogen cyanide (HCN) is acutely lethal, and chlorine (Cl₂) is a toxic gas. Always consult the SDS for the specific binary compound. Do not assume safety based solely on simplicity of composition.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Binary Compound
Formula AₓBᵧ (e.g., NaCl, MgO, CO₂)
Synonyms Two-element compound, diatomic compound (if molecular with 2 atoms), binary salt

Frequently Asked Questions

A binary compound is a chemical compound consisting of exactly two different elements, though not necessarily in a 1:1 ratio. Examples include sodium chloride (NaCl), water (H₂O), sulfur dioxide (SO₂), and iron(III) oxide (Fe₂O₃). Binary compounds can be ionic or covalent depending on the elements involved.

More "B" Terms

View all "B" terms →
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z