metallic bond

Thân thiện

A scientist draws a diagram of a metallic bond on a classroom whiteboard.

Definition

Noun: A type of chemical bond characteristic of metals, where the outer electrons of the atoms are delocalized and free to move throughout the entire structure, forming a "sea of electrons" that binds the positive metal ions together. This structure is responsible for typical metallic properties like electrical and thermal conductivity, malleability, and ductility.

Usage

The term "metallic bond" is used to describe the primary bonding mechanism within pure metals and alloys. It explains the physical properties that distinguish metals from other materials. - It functions as a countable noun (e.g., a metallic bond, the metallic bonds). - It is often discussed in contrast to ionic or covalent bonds.

Examples

• The high electrical conductivity of copper is a direct result of its metallic bond.
• In a metallic bond, the valence electrons are not associated with any single atom.
• Scientists study the nature of the metallic bond to develop new alloys with superior strength.

Advanced Usage

• "Delocalized electrons in a metallic bond": This phrase emphasizes the key feature where electrons are not fixed between two atoms but are mobile.
• "Strength of the metallic bond": Refers to how strongly the metal ions are held together, which affects properties like melting point and hardness. For example, tungsten has very strong metallic bonds, giving it an extremely high melting point.

Variants and Related Words

• Metallic bonding (n): The phenomenon or process itself; often used interchangeably with "metallic bond" but can be slightly more abstract.
  • Metallic bonding is the key concept behind a metal's luster.
• Metallic (adj): Of or relating to metal or the nature of a metal.
  • The wire has a metallic sheen.

Synonyms

• Metallic bonding: (The process/type of bonding)
• Electron-sea bonding: (A descriptive synonym highlighting the delocalized electrons)
• Delocalized bond: (A more general term that can apply to metallic bonding)

Related Phrases and Concepts

• "Sea of electrons": A common metaphorical description for the delocalized electrons in a metallic bond.
  • The atoms are held together by a sea of electrons.
• "Band theory": The quantum mechanical model that more fully explains metallic bonding and conductivity.
• "Metallic lattice": The regular arrangement of positive ions within the sea of electrons.

Học thuật

Noun

1. a chemical bond in which electrons are shared over many nuclei and electronic conduction occurs