CHALLENGES (read Instructions and Notes & Credits first!): Create Methane! Hints: It is CH4, or C-H4 / C-H -H -H -H in my notation. INSTRUCTIONS Read all the paragraphs in this section for more details. Click on the button in the upper-left corner to toggle between atoms and bonds. Use the arrow keys to change the type of atom or bond. Click to create an atom or bond. Space to clear. Stop the project and take a screen-shot to save a picture of your molecule. LEWIS BONDING MODEL For more information, search up Lewis Dot Bonding Model. The Lewis Bonding Model is a model used by chemists to show chemical bonds and lone pairs in a molecule, which can help predict chemistry. However, it is not so good at predicting molecular shape, bond length, or molecular size. The Lewis Bonding Model is rather simple. Electrons share electrons in molecular bonds called covalent bonds. A covalent bond is represented by lines. One line is a single bond, Two is a double bond, and Three a triple bond. There are no quadruple covalent bonds. A line represents two shared electrons. The groups of two dots are lone pairs, or the non-bonding valence electrons in atoms. They are in pairs because they have opposite spins and can fit into the same atomic orbital. But that's more about quantum mechanics and models more advanced than the Lewis Model. All current atoms want 8 electrons in their outer shell (except hydrogen and helium, which need two). If you need more information just search up Lewis Bonding Model.
Lewis Dot Bonding Text Notation I made this up so you can share the models you have made. A lone pair is a colon (:). A single bond is a dash (-), a double bond an equal sign (=) and a triple bond a triple bar (≡). Carbon dioxide is ::O=C=O:: and represents the molecular shape. If an atom is bonded to more than 1 atom then you list them separately with a space. So water is ::O-H -H or ::O-H2. Ammonia is :N-H3 or :N-H -H -H. You need the space because :N-H-H-H indicates that the hydrogen atoms are bonded to each other, and they are not. Chloroform is C-Cl3 -H or C-Cl -Cl -Cl -H. All By Me. Art: Atoms - @CodeBit Bonds - @CodeBit Project: Program - Scratch Thumbnail - @CodeBit Code: Scripts - @CodeBit
