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Ch.6 Ionic and Molecular Compounds - Coggle Diagram
Ch.6 Ionic and Molecular Compounds
Types of Atom Combinations
Ionic compound- one or more electrons transfer from a metal to a nonmetal and form positive and negative ions
Covalent bond- is a sharing of valence electrons
molecule- two or more atoms held together by covalent bonds
VSEPR Theory
Electron groups are arranged as far apart as possible around the central atom to minimize propulsions between the groups.
Linear shape and electron group geometry have two double bonds between to atoms at an angle of 180 degrees
Trigonal planar shape and group geometry has three electron domains each at 120 degrees
Tetrahedral electron and geometry shape have four bond to the central atom and are 109 degrees
When two atoms are bonded to a central atom and there is one lone pair, this will be a trigonal planar electron group and a bent shape.
A molecule can have three bonded atoms at a trigonal pyramidal shape and have a tetrahedral electron-group geometry at 109 degrees
Molecules, like water, can have four electron domains and have a tetrahedral electron group geometry and have a bent shape
Lewis Structures for Molecules and Polyatomic ions
diagram the sharing of valence electrons for molecules/ polyatomic ions
Electronegativity and Bond Polarity
electronegatovity is an atom's ability to attract the shared electrons in a chemical bond
EN 0.0-0.4 is nonpolar and the electrons are shared equally (london dispersion forces)
EN 0.5-1.8 is polar and valence electrons are shared unequally (dipole-dipole attractions)
EN >1.8 is ionic and transfers electrons from one atom to the other (can experience hydrogen bonding)
polarity of a bond depends on the difference of the electronegativity values of its atoms
