1 / 17

Metallic Bonding

Metallic Bonding. Metals in the periodic table. Metals Essential for Life. Properties of Metals. Solids (except Hg) – most have high mp & bp Luster Malleable & ductile Good conductor of heat & electricity Metals are losers! (metals lose electrons and form positive ions)

cjanice
Télécharger la présentation

Metallic Bonding

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 Bonding

  2. Metals in the periodic table

  3. Metals Essential for Life

  4. Properties of Metals • Solids (except Hg) – most have high mp & bp • Luster • Malleable & ductile • Good conductor of heat & electricity • Metals are losers! (metals lose electrons and form positive ions) • Low ionization energy • Low electronegativity

  5. Metallic Bonding Metal atoms form a lattice. The valence levels of the atoms overlap. The valence electrons can roam easily from 1 atom to another throughout the metal. Metallic bonding

  6. Delocalized Electrons • Valence electrons are free to roam throughout crystal • “Sea of Mobile Electrons” • Metallic Bond = attraction between positive metal kernel and electron sea.

  7. Comparison of Metallic & Ionic Bonding Lattice points are all positive. Electrons roam. Lattice points are positive and negative.

  8. Properties of metals • Electrons can move so they conduct a current. • Electron sea holds the metal together when it’s deformed.

  9. Metallic Bonds • Pretty strong. All metals but Hg are solids at room temperature. • Most have moderately high melting points & high boiling points.

  10. Deformation of Metals Deformation of Metals

  11. Why metals are deformable & ionic crystals aren’t:

  12. Deformation of Metals • Applied force moves metal cations. • Cations are held together by electron sea.

  13. Alloys • Mixture of elements that has metallic properties. • Adjust the mixture to get desired properties. • Can be substitutional or interstitial

  14. Substitutional Interstitual Types of Alloys Steel Bronze Brass

More Related