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Videos de Conceptos Relacionados

Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Molecular Orbital Theory II03:51

Molecular Orbital Theory II

Molecular Orbital Energy Diagrams
Chemical Bonds02:40

Chemical Bonds


Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons from...
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...

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Video Experimental Relacionado

Updated: Jun 3, 2026

Hydrogen Charging of Aluminum using Friction in Water
07:50

Hydrogen Charging of Aluminum using Friction in Water

Published on: January 28, 2020

La densidad de electrones de unión en el aluminio.

Philip N H Nakashima1, Andrew E Smith, Joanne Etheridge

  • 1ARC Centre of Excellence for Design in Light Metals, Monash University, Victoria 3800, Australia. philip.nakashima@eng.monash.edu.au

Science (New York, N.Y.)
|March 26, 2011
PubMed
Resumen

Investigando el aluminio.

Área de la Ciencia:

  • Física del estado sólido física del estado sólido.
  • Ciencia de los materiales ciencia de los materiales.
  • La química cuántica es una química cuántica.

Sus antecedentes:

  • El aluminio a menudo se modela como un gas ideal de electrones libres.
  • Determinar la redistribución de electrones en el enlace químico del aluminio es un reto.
  • Los resultados experimentales y teóricos para la distribución de electrones han diferido.

Objetivo del estudio:

  • Para determinar experimentalmente la distribución de los electrones de unión en el aluminio.
  • Para correlacionar la distribución de electrones con las propiedades elásticas del aluminio.

Principales métodos:

  • La difracción cuantitativa de electrones de haz convergente (qCBED).
  • Cálculos de la teoría funcional de la densidad (DFT).

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Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
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Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

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Last Updated: Jun 3, 2026

Hydrogen Charging of Aluminum using Friction in Water
07:50

Hydrogen Charging of Aluminum using Friction in Water

Published on: January 28, 2020

Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments
05:50

Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments

Published on: May 11, 2017

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
08:32

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Published on: May 14, 2016

Principales resultados:

  • La distribución experimental de electrones coincide estrechamente con los cálculos de DFT.
  • Se estableció una correlación cuantitativa precisa entre las propiedades elásticas y las distribuciones de potenciales electrónicos/electrostáticos.

Conclusiones:

  • El estudio proporciona una medición experimental precisa de la distribución de electrones en el aluminio.
  • Los hallazgos vinculan la estructura electrónica con el comportamiento elástico macroscópico.