1 / 13

Metallic Bonds

Metallic Bonds. Chemistry Mrs. Coyle. Cations packed in “a sea of electrons”. Metals. Metals consist of closely packed cations floating in a “sea of electrons”. All of the atoms are able to share the electrons. The electrons are not bound to individual atoms. Properties of Metals.

vashon
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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Metallic Bonds ChemistryMrs. Coyle

  2. Cations packed in “a sea of electrons”

  3. Metals • Metals consist of closely packed cations floating in a “sea of electrons”. • All of the atoms are able to share the electrons. • The electrons are not bound to individual atoms.

  4. Properties of Metals • Good conductors • Ductile • Malleable • Electrons act as a lubricant, allowing cations to move past each other

  5. Metals have a Crystalline Structure • Packed spheres of the same size and shape: • Body Centered Cubic • Face Centered Cubic • Hexagonal Close Packed

  6. Body Centered Cubic Chromium

  7. Face-Centered Cubic Gold

  8. Hexagonal Close-Packed Zinc http://phycomp.technion.ac.il/~pavelba/hcpS.gif

  9. Alloys • Mixtures of two or more elements, at least one of which is a metal. • Made by melting, mixing, then cooling the metals. • May contain non-metals like carbon.

  10. Alloys • Properties are superior to their components. • Sterling silver • 92.5% Ag, 7.5% Cu • Harder than silver • Bronze • 7:1 Cu to Sn (tin)

  11. Alloys • Stainless Steel • Fe 80.6%, Cr 18%, C 0.4%, Ni 1% • Cast Iron-Fe 96%, C 4%

  12. Types of Alloys • Two types of formation: • Substitutional alloys • Similar size atoms – replacement • Interstitial alloys • Different size atoms – smaller ions fill interstices (spaces between atoms)

  13. Why is a metal ductile but an ionic compound is not?

More Related