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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.

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Names to Formulas 2

The Names to Formulas 2 Concept Builder provides learners with a cognitive workout identify correct and incorrect formulas for binary molecular, binary ionic, and for ionic compounds containing polyatomic ions. Each question presents the names of three compounds and a formula for each. Students must identify which of the proposed formulas is inconsistent with the given name. Once they feel comfortable with their choices, they can check their answers and receive immediate feedback. There are three different levels of difficulty. The first level includes binary molecular compounds. The second difficulty level includes non-binary ionic compounds that contain a polyatomic ion. The third difficulty level includes a mix of binary compounds and compounds with polyatomic ions. There are a total of 42 questions in this Concept Builder. They are organized into 14 different Question Groups and spread across the three difficulty levels. Question-specific help is provided for each of the 14 situations. Questions in the same Question Group are similar questions. 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.

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