Metallic bonds
This presentation is the property of its rightful owner.
Sponsored Links
1 / 6

Metallic Bonds PowerPoint PPT Presentation


  • 115 Views
  • Uploaded on
  • Presentation posted in: General

Metallic Bonds. Metals don’t bond ionically For lattices Don’t share or lose e- like covalent or ionic bonds. Electron Sea Model. All metal atoms in a metallic solid contribute their valence e- to form a “sea” of e-

Download Presentation

Metallic Bonds

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Metallic bonds

Metallic Bonds


Metallic bonds

  • Metals don’t bond ionically

    • For lattices

  • Don’t share or lose e- like covalent or ionic bonds


Electron sea model

Electron Sea Model

  • All metal atoms in a metallic solid contribute their valence e- to form a “sea” of e-

    • These e- move easily and freely because they are not tied to a specific atom

      • Delocalized electrons

    • Metallic cation is formed

All empty space is evenly distributed v.e-


Metallic bonds1

Metallic Bonds

  • The attraction of a metallic cation for delocalized electrons

  • This accounts for a lot of theproperties of metals

    • Range of melting points

    • Malleability

    • Ductile

    • Durable

      • Hard to remove metallic cation because of the strong e- attraction

    • Mobile e-

      • Explains why they are good conductors


Metallic bonds2

Metallic Bonds

  • Transition metals tend to be harder due to “d” sublevel electrons

    • More e- = more attraction

  • Alkali metals are softer because they contain only “s” sublevel (1 sublevel)

    • Less e- = less attraction


Alloys

Alloys

  • Mixture of elements (usually metals) that has metallic properties

  • Substitutional alloy – atoms of original metallic solid replaced by other metal atoms of similar size

    • Sterling silver  silver is replaced with Cu atoms

  • Interstitial alloy – small holes (interstices) in a metallic crystal that are filled with smaller atoms

    • Like pouring sand in a bucket of gravel

    • Ex. Carbon steel

      • Holes in iron are filled with carbon which strengthens the iron


  • Login