Electron-sea model Powerpoint Edit and Revise presentation, chemistry homework help

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Create a three-slide PowerPoint presentation that describes the electron-sea model of metallic bonding and the relationship between metallic bond strength and enthalpy of vaporization.  Your PowerPoint should include graphics. Make your language simple, as if you are explaining these ideas to someone with no prior knowledge of these concepts or chemistry in general

Using the PowerPoint presentation provided, Revise, Edit and perfect presentation to meet requirement allowing for highest possible grade for assignment.

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ELECTRON SEA MODEL OF METALLIC BONDING METALLIC BONDS AND THE ELECTRON SEA MODEL The characteristics of metallic bonds explain a number of unique properties of metals. • The electron sea model is a very simple model that explains the physical properties of metals, how metallic elements bond to each other and why metals are ductile and malleable. • • Metals are good electrical conductors because of their free-moving sea of electrons that allow the metal to carry electric current and transfer electricity (electrons) easily without impeding ionic or molecular bonding. A metal’s sea of free-moving electrons accounts for its unusual electrical conductivity. • Metals are ductile and malleable because local bonds can be easily broken and reformed. The malleability and ductility of metals are possible because metallic bonding is the same in all directions throughout a solid. One plane of atoms in a metal can slide past another without encountering resistance or breaking bonds. • Metals are shiny(have luster). Light cannot penetrate their surface; their photons simply reflect off the metal surface However, there is an upper limit to the frequency of light at which the photons are reflected. • The strong attractive forces of metallic bonds contribute to the low volatility, high melting and boiling points, and high density of most metal. Metals in group XII however, are exceptions to this rule (zinc, cadmium, mercury). • The elements involved in this type of bonding are mainly the transition metals like Fe, Cu, Au, Ag. RELATIONSHIP BETWEEN METALLIC BOND STRENGTH AND ENTHALPY OF VAPORIZATION The strength of metallic bonding can be measured by the enthalpy (heat) of vaporization. This is the amount of energy as heat required to vaporize /change the state of a metal which in turn is a measure of the strength of the bonds that hold the metal together. In a metal, the number of electrons displaced from a single atom’s outer shell determines the strength of the bond. The larger the number of electrons in a metal’s outer shell, the more its delocalized which results in a stronger bond. Therefore, the heat needed to change a metal’s state depends on the strength of a metal’s bonds. This explains why metals have higher boiling and melting points. The enthalpy
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The electron-sea model of
metallic bonding
22nd September 2016

Introduction
A metallic bond depicts an attraction force present between metallic
ions and mobile electrons.
 Most metals exhibit a vacant outer shell or have very few electrons
present in this shell.
 This move implies that the electrons are free and can move around.
 In creation of a metallic bond, such electrons are not shared or
transferred (Luo, 2012).
 Instead, they move freely and are owned by all metal atoms close to
them.
 Each metal atom contributes an electron to the formation of a “sea of
electrons”.


continued



These electrons bind the entire structure together, hence
the term electronic sea of...


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