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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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Name That Element - Questions 1 Help

The 100+ existing elements are organized into a table known as the Periodic Table. The familiar looking shape of the table is based upon a number of observations about the elements. One of those observations was that there were groupings of elements that had very similar properties. These elements were placed in the same column, referred to as families, and given family names such as alkali metals, alkaline earth metals, halogens, and noble gases.

There are two similar questions in this Question Group. Each time one of the versions appears, the answer options are presented in a scrambled order. One of the two versions is shown below.
 

Version 1:
I am an alkali metal located in the second period of the periodic table. Who am I?
Argon (Ar)
Beryllium (Be)
Calcium (Ca)
Lithium (Li)
Magnesium (Mg)
Neon (Ne)
Sodium (Na)
Titanium (Ti)

Much of what you need to know to answer this question is discussed in the Fundamentals section above. But if you would like to further your understanding, inspect and study the infographic below on the topic.




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