V vs Elemental

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

Meet the 118. Elemental turns the periodic table into something you can actually play with. Learn element names, symbols, atomic numbers, families and positions through interactive cards, memorable mnemonics and quick chemistry games designed to make the table stick. LEARN THE ELEMENTS Explore all 118 elements through colourful interactive cards. Discover: • Element names and symbols • Atomic numbers • Periodic table positions • Element families • Real-world uses • Interesting facts • Memorable memory tricks MEMORY TRICKS THAT STICK Elemental uses deliberately memorable associations to help difficult names and symbols stay in your head. Hydrogen becomes a huge H-shaped balloon. Iron becomes a FErocious iron robot. Silver becomes an AGed silver-haired wizard. The stranger the connection, the easier it can be to remember. LONGEST CHAIN How many elements can you connect? Carbon ends in N, so your next element must begin with N. Carbon → Nickel → Lithium → Molybdenum… Choose carefully. Each element can only be used once, and your choice determines which elements are available next. Try to build the longest chain possible from the periodic table. PLAY TO LEARN Elemental includes a collection of quick chemistry games: • Longest Chain • Symbol Sprint • Where Am I? • Build the Table • What Am I? • Family Sort • Flash Quiz Knowing more elements gives you more moves. BUILD YOUR PERIODIC TABLE Your periodic table becomes a visual map of your progress. Elements move through: Unknown → Seen → Learning → Known → Mastered See which elements you know well, spot the ones that need another look and work towards mastering all 118. LEARN YOUR WAY Choose from learning collections including: • All 118 • Weak Elements • Starter Pack • Your Body • Your Phone Elemental also creates a short personalised Daily 5 based on the elements most worth revisiting. PRIVATE BY DESIGN No account is required. Your learning progress and game records stay on your device. Elemental does not contain advertising or third-party tracking. Whether you're revising chemistry, learning the periodic table for the first time or simply want to see how many elements you can remember, Elemental gives you a more playful way to learn the 118. 118 elements. One table. How many can you master?