covalency

Thân thiện

Definition

Noun: 1. The chemical bond formed by the sharing of electron pairs between atoms: Covalency refers to the phenomenon where atoms achieve stable electron configurations by mutually sharing one or more pairs of electrons. 2. The number of electron pairs an atom can share: It also denotes the specific bonding capacity of an atom, measured by the number of covalent bonds it can form.

Usage Examples

• Noun:
  • The covalency of the bond in a hydrogen molecule (H₂) is one, as each hydrogen atom shares one pair of electrons.
  • Oxygen has a maximum covalency of two, typically forming two covalent bonds, as in water (H₂O).
  • Understanding the concept of covalency is fundamental to predicting molecular geometry.

Advanced Usage

• Coordinate Covalency (Dative Covalency): A specific type of covalent bond where both shared electrons are donated by a single atom.
  • In the ammonium ion (NH₄⁺), the bond between nitrogen and one hydrogen is formed by coordinate covalency.

Variants and Related Words

• Covalent (adj): Describing a bond or interaction characterized by the sharing of electron pairs.
  • A covalent bond is generally stronger than an ionic bond in organic molecules.
• Covalence (n): A synonym for covalency, often used interchangeably.
  • The molecule's stability is due to the high covalence of its central atom.

Synonyms

• Covalent bond strength: (In the context of bonding capacity)
• Electron-pair bond order: (Related to the nature of the bond)

Related Phrases and Concepts

• Covalent Bond: The actual bond resulting from electron sharing.
  • A single covalent bond represents one shared pair of electrons.
• Covalent Compound: A substance composed of atoms linked by covalent bonds.
  • Methane (CH₄) is a simple covalent compound.
• Covalent Radius: Half the distance between the nuclei of two identical atoms joined by a covalent bond.
  • The covalent radius of chlorine is used to estimate bond lengths in its compounds.

Học thuật

Noun

1. valence characterized by the sharing of electrons in a chemical compound; the number of pairs of electrons an atom can share

Từ đồng nghĩa

• covalence