Wathiq Pro vs V

This App aims to allow you, as a student, to watch your lessons explained in a very simple and easy to understand methods by very experienced teachers. This new version brings new features to help you make the most of your app. We've improved application performance to become faster and more stable. We've added a new section to watch offline to reduce your Internet consumption, as well as other new features. Enjoy learning and best wishes for success. Please lets us know your feedback. Send us your comments and suggestions so we can improve our services.

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