Metallic and Ionic bonding.

Metals: -Good conductors of electricity -Good conductors of Heat -Lustrous or reflective when freshly lop or polished -Malleable ? throw out be do by beating -Ductile ? can be run for into a wire -Exihibit a range of melting and boiling temperatures -Generally deliver high densities Exceptions in metals: -Mercury ? liquid at room temperature, remarkably low melting point. -Chromium ? brittle rather than malleable. Structure of Metals sit around of metal in solid state must be one in which: -Some of particles be charged and free to act as -There atomic number 18 strong forces mingled with particles passim metal fretwork -Force that populate between charged particles: static force Obtaining stability ? psychotherapeutic one or more of outer knock passel (valence) electrons into a common pool within grill. Atom is like a shot a imperious ion. Metallic bonding model -The solitary(prenominal) particles that are itsy-bitsy enough to move through a solid hoop are electrons. If a metal subatomic particle loses one or more electrons it ground levels a positive ion. -Ions: atoms or groups of atoms that piddle every gained or lost electrons and so have a banish or positive charge. -In ions, tot up number in protons disaccord from total number of electrons -Cations: atoms that have lost electron to trope + charge ions. (Metals) -Anions: Atoms that have gained electrons form - charge ions. (Non-metals) -Positive ions are put in closely packed structure. oThis structure described as a regular, 3D radiator grille of positive ions. The ions occupy fix positions in the lattice. oThe much small electrons are free to move throughout the lattice. ?Called delocalised electrons ?Because they belong to lattice as a whole ?Delocalised electrons aim from valence (outer) shell. (fig 3.5) oElectrons that are not free to move throughout the lattice: ? situate electrons ?Localised electrons in inner shell. -The ions are held in lattice by attrac tion to delocalised... ! If you want to nail a beat essay, order it on our website: OrderCustomPaper.com

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