Skip to Content Go to sign in Skip to Primary Navigation Skip to Secondary Navigation Skip to Page Navigation Skip to Header Navigation Skip to Footer Navigation Read more about accessability options and our navigation

Physics Classroom is making strides to make our site accessible to everyone. Our site contains 6 navigation areas. The Primary, Secondary, and Page Level navigations have a screen reader version of their nav structure that allows using the left and right keys to navigate sibling navigation items, and up or down keys to navigate parent or child navigation items. The others can be navigated using tabs. The Primary Navigation handles the first 2 levels of site pages. The Secondary (which is not always available) handles the 3rd and 4th level of structure. The Page level navigation allows you to navigate the current page's headings quickly. The Header Navigation contains the Light/Dark Mode toggle, Search, Notifications and account login. The Breadcrumb Navigation contains the breadcrumb of the current page. If the current page has a breadcrumb, you can get to it by skipping to the content and tabbing in reverse (shift plus tab). The Footer Navigation contains links such as Privacy, Contact, about and terms. Some resources contain an Audio Player that can be activated by holding down the T key for 3 seconds, and then using K to pause and resume. While not every area of Physics Classroom is usable purely from keyboard and screen reader, we are committed to continue work on making this possible. If you have questions or need additional help, please use this link to contact us.

Return to screen reader navigation
Home Concept Builders Chemical Bonding and Molecular Shape Valence Shell Electron Pair Repulsion Theory

Valence Shell Electron Pair Repulsion Theory

The Which One Doesn't Belong - Valence Shell Electron Pair Repulsion Theory Concept Builder challenges learners to use the Valence Shell Electron Pair Repulsion Theory to determine the shape of a molecule if given its formula. Each question presents learners with three different formulas. Learners must first toggle through a collection of three to six possible Lewis Diagrams and identify the correct Lewis Diagrams. Once the three Lewis Diagrams have been correctly identified, they must determine which of the three molecules has a molecular shape that is different than the other two. There are a total of 36 questions in this Concept Builder. They are organized into 12 different Question Groups and spread across the three difficulty levels. Question-specific help is provided for each of the 12 situations. Questions in the same Question Group include the same molecules; only their order has been scrambled. The three difficulty levels differ in terms of the number of questions that must be answered and the sophistication of the Lewis Diagrams. The built-in score-keeping makes this Concept Builder a perfect candidate for a classroom activity.

🚀︎ Launch Concept Builder

Users are encouraged to open the Concept Builder and begin. There is no need for an activity sheet for this Concept Builder.

Learners and Instructors may also be interested in viewing the accompanying Notes page. Technical information, teaching suggestions, and related resources that complement this Interactive are provided on the View Notes.