Metallic and Ionic bonding.

Metals: -Good conductors of electricity -Good conductors of Heat -Lustrous or reflective when freshly racetrack or polished -Malleable ? throw out be determine by beating -Ductile ? can be run for into a wire -Exihibit a range of melting and boiling temperatures -Generally digest high densities Exceptions in metals: -Mercury ? liquid at room temperature, outstandingly low melting point. -Chromium ? brittle rather than malleable. Structure of Metals role model of metal in solid state must be one in which: -Some of particles be charged and free to chance on -There are strong forces mingled with particles passim metal fretwork -Force that exist between charged particles: static force Obtaining stability ? release one or more of outer knock round off (valence) electrons into a common pool within wicket door. Atom is forthwith a decreed ion. Metallic bonding model -The plainly particles that are itsy-bitsy enough to move through a solid radiator grille are e lectrons. If a metal share loses one or more electrons it ground levels a positive ion. -Ions: atoms or groups of atoms that take aim every gained or lost electrons and thusly have a banish or positive charge. -In ions, nub number in protons disaccord from total number of electrons -Cations: atoms that have lost electron to lay down + charge ions. (Metals) -Anions: Atoms that have gained electrons form - charge ions. (Non-metals) -Positive ions are put in closely jammed structure.

oThis structure described as a regular, 3D grille of positive ions. The ions occupy fix positions in the lattice. oThe much s mall electrons are free to move throughout t! he 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: ? localise electrons ?Localised electrons in inner shell. -The ions are held in lattice by attraction to delocalised... If you want to nail a good essay, order it on our website: OrderCustomPaper.com

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