Metallic Bonding - Humble Independent School District

Metallic Bonding A metallic bond is the attraction Metallic of a ________ _______for cation ____________electrons delocalized Electron Sea Model proposes that the

nuclei of the metallic cations hold onto their correct ________ of _________, but they may be any valence e- of a neighboring nucleus. They are NOT ______ or _____; they are floating in a sea above the _______ and can move freely from one atom to the next. Electron Sea Model proposes that the nuclei of the metallic cations hold

onto their correct number of electrons, but they may be any valence e- of a neighboring nucleus. They are NOT _______ or _____; they are floating in a sea above the ______and can move freely from one atom to the next. Electron Sea Model proposes that the nuclei of the metallic cations hold onto their correct number of

electrons, but they may be any valence e- of a neighboring nucleus. They are NOT shared or lost; they are floating in a sea above the nuclei and can move freely from one atom to the next. delocalized electron = The valence e- of a metal that is free to move easily from one cation to another

Attractions between positive cations and the negative sea of e- hold the metal atoms together in a lattice. Properties of metals

med. high melting points high boiling points malleable and ductile heat conductors electrical conductors Brittleness is typical of ionic substances. Imagine what happens to the crystal if a stress is applied which shifts the ion layers slightly.

Ions of the same charge are brought side-by-side and so the crystal repels itself to pieces! Malleability of metals Whereas ionic cmpds shatter when hit with a mallet (hammer), metallic cmpds can be flattened and shaped. Why? As the number of

delocalized electrons increases, hardness & strength increase. In the transition metals, mobile electrons consist of both the valence electrons (highest s) and the inner d electrons. Alloy = mixture of metals; not a cmpd

18 carat Gold Au 75% Ag/Cu 25% Sterling silver Ag 92.5% Cu 7.5% Coinage silver Ag 90% Cu 10% Plumbers solder Pb 67% Sn 33% Pewter Sn 85% Cu 7.3% Bi 6% Sb 1.7% Brass Cu 60% Zn 39% Sn 1% Steel Fe 99% C 1% Cast Iron Fe 96% C 4% Stainless Steel Fe 80.6% Cr 18% C 0.4% Ni 1%

Types of alloys When two metals with similar size ions are mixed, a substitutiona alloy is formed examples: l Brass, pewter, 10 carat gold When one of the metals ions is

considerably smaller than the other metal, the smaller ions fill interstices in the small spaces (___________) between the larger ones. This is Interstitial _____ alloy an __________ example:Carbon steel

Summary Sea of electrons are reason for a metals properties Alloys are mixtures of metals Substitutional alloys have similar sized elements Interstitial alloys have different sized elements Metals are malleable (can be flattened) and ductile (can be drawn into wires),

and have luster (are shiny)

Recently Viewed Presentations

  • Slide 1

    Slide 1

    Institute of Education, University of London, University of Oxford, Birkbeck, University of London, University of Nottingham) A Quality Curriculum An appropriate curriculum: Builds on what children can do. Opportunities to engage in adult directed and child initiated activities.
  • PowerPoint Presentation

    PowerPoint Presentation

    Your chapter logo, .75" in height. Access the Office Space Demand Forecast, Fourth Quarter 2017. Demand for office space to increase as economy strengthens, according to NAIOP's Office Space Demand Forecast, Fourth Quarter 2017.. Net absorption of office space is...
  • PowerPoint Presentation

    PowerPoint Presentation

    LSD Radix Sort. The previous version of radix sort is called MSD radix sort. It goes through the data digit by digit, starting at the most significant digit (MSD). LSD stands for least significant digit. LSD radix sort goes through...
  • PowerPoint Presentation

    PowerPoint Presentation

    Grammar, Punctuation and Spelling. Grammar, Punctuation and Spelling is made up of two papers which will take place on . Monday 13. th. May 2019: Paper 1 is the longer paper lasting 45 minutes,
  • From Sudoku to microfluidics array data. - University of Manitoba

    From Sudoku to microfluidics array data. - University of Manitoba

    The Curious Business of Square Integer Matrices: From Sudoku to microfluidics array data. Peter Loly. With Ian Cameron and Adam Rogers. 10 March 2014
  • Randomised controlled trial of acceptance and commitment ...

    Randomised controlled trial of acceptance and commitment ...

    Arial Calibri Wingdings Default Design 1_Default Design Acceptance & Commitment Therapy for people with persisting psychosis: Rationale, evidence, and work in progress from Melbourne, Australia Slide 2 Arguments for applying ACT to psychosis Importance of these clinical trials Limitations of...
  • How Banks & Thrifts Create Money - Humble Independent School ...

    How Banks & Thrifts Create Money - Humble Independent School ...

    How Banks & Thrifts Create Money Chapter 14
  • Before You Begin: Assign Information Classification

    Before You Begin: Assign Information Classification

    Configuration Guide V3 Solution SE Team, Korea Jaemi Lee ( [email protected] ) Agenda CS-MARS Overview MARS Architecture Setup Process MARS 주요 기능 Configuration Troubleshooting Notes CS-MARS 필요성 CS-MARS 필요성 우리 모두가 원하는 것!