Mirage vs V

Mirage applications are intended to be used in science classroom (senior high school). To use this application you need to download and print the marker set: http://mirage.ticedu.fr/?p=2324 How to use the app : Card 1 :Find out what this molecule is and write one sentence about the molecule's geometry ? Card 2 to 6 : Try to explain the following molecule's geometry. (hint : use Lewis, electrons pairs, lone pairs...) Card 7 to 11 : answers for cards 2 to 6, showing molecule's geometry, electrons pair and lone pairs. Card 12 : final answer for cards 1, molecule showing molecule's geometry, electrons pair and lone pairs. Once downloaded this one does not require an Internet connection.

Build and observe to come true with figures of repulsion, geometry, angles. V-SPER, free application, is a support for the teaching of the VSPER theory (Valence Shell Electron Pair Repulsion). This theory makes it possible to predict the geometry of molecules from the sole electrostatic repulsion of valence electron pairs. It is based on the Lewis model of distribution of the valence electrons of the atoms concerned. The latter is a prerequisite to take full advantage of V-SPER. The molecule is denoted AXnEm. The atoms (or portions of molecules) linked to the central atom A are denoted X (n: number of X, whether they are linked by single or multiple bonds). The non-bonding electron pairs belonging to the central atom A and not being involved in bonds are denoted E (m: number of E). V-SPER allows to build simple and 3D objects (molecules) and to display the repulsion figure in blue (FigREP), the molecular geometry in yellow (Geom) as well as the angles. Some angles are just modeled and do not always correspond to experimentally measured angles, such as the relative lengths of single or multiple bonds