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

Intermolecular Forces

The Intermolecular Forces Concept Builder challenges learners to identify and characterize intermolecular forces (London dispersion force, dipole-dipole interactions, and hydrogen bonding), to identify the types of IMFs a substance would experience, and to rank the relative strength of the IMFs in a variety of substances. There are a total of 39 questions organized into 13 Question Groups and spread across three different activities. In the first activity - Paragraph Completion - learners complete three different multi-blank paragraphs by selecting words and phrases from a bank. In the second activity - Force Identification - learners identify the types of intermolecular forces experienced by a substance if given its formula and Lewis diagram. In the third activity - Ranking Tasks - learners rank three substace according to the strength of their intermolecular forces when given the formulas. Question-specific help is provided for each of the 13 Question Groups. The built-in score-keeping makes this Concept Builder a perfect candidate for a classroom activity.

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.

Return to Screen Reader Navigation