We could not find your account using Instant Login.

Please try again, or contact your system administrator or customer service.

Core Concepts: Periodic Table

Site Help

Comprised of curriculum-correlated content, Core Concepts: Periodic Table is a content-driven, visually stimulating, and media-rich online science resource. If you do not find the answer to your question in our extensive help section, please contact us for further assistance.



System Requirements


Core Concepts: Periodic Table is supported on Windows and macOS. To ensure the best experience, we recommend using the latest version of your preferred browser:

  • Chrome or Chromium-based browser (Current and previous two versions)

  • Firefox (Current and previous two versions)

  • Safari (Current and previous two versions)

The site is compatible with Apple and Android devices, netbooks, interactive whiteboards, Chromebooks, 2-in-1 laptops, and learning management systems such as Blackboard and Google+.


Core Concepts: Periodic Table supports integration with all major LMS systems.


Element Builder/The Elements of the Periodic Table

The interactive Element Builder activity is compatible with PCs, laptops, and mobile devices. However, PCs and laptops are recommended. The interactive Elements of the Periodic Table feature is compatible with PCs, laptops, and mobile devices.


Accessing the Site


Core Concepts: Periodic Table is a subscription-based Web site. You can log on to the site in four ways: via username and password, referring URL, IP authentication, and Google Single Sign-On.


If you have trouble accessing the site, please contact the person inside your school, library, or institution in charge of database access. If you need further help, please contact us. When contacting us, please have ready your account information, including the name of the institution or individual on the account.


Single Sign-On (SSO)


Institutions configure Google Single Sign-On (SSO) to make it fast and easy for users to access multiple products. Interested customers should contact Customer Care to implement Single Sign-On with Core Concepts: Periodic Table. If your institution uses SSO, and has configured this site to work with it, users can simply click the “Instant Login” button and sign in with their Google SSO credentials. Rosen Publishing does not sell any data from Google Single Sign-On or use it for marketing purposes.


Editorial Philosophy


Compelling, authoritative science content from Rosen Publishing—a gold standard in nonfiction resources for over fifty years—is available online in Core Concepts: Periodic Table.


All content in Core Concepts: Periodic Table is presented in an accessible, interactive manner that makes the periodic table real, relevant, and engaging. Authoritative, user-friendly articles make complex topics understandable. Supporting STEM learning initiatives and promoting digital literacy and contemporary and traditional research skills, Core Concepts: Periodic Table is an invaluable tool for 21st-century learners.


Core Concepts: Periodic Table provides comprehensive curricular support. Correlated to Common Core state standards for English language arts (ELA) and mathematics; state and provincial standards for science, language arts, and mathematics; and Next Generation Science Standards and other national science standards, Core Concepts: Periodic Table is a rich, reliable source for science research and learning. Content is sourced from a talented range of science experts, educators, and authors. Dynamic videos and interactive tools partner with informative text to offer learners science content that is both required and inspired. Core Concepts: Periodic Table covers the subjects that are high-stakes and high-interest for today’s students and tomorrow’s scientists.


Core Concepts: Periodic Table draws on Rosen's extensive and growing list of new and backlist books from its most trusted and respected series. Through a rigorous editorial process, all content is thoroughly revised and updated for online use. Content is written by professional writers, experienced in communicating to a student audience and with expertise in a range of science subjects.


Core Concepts: Periodic Table does not accept advertising.


Resources for Teachers/Librarians


Core Concepts: Periodic Table offers an extensive array of resources to help librarians and educators most effectively use this online resource. From curriculum correlations and promotional materials, to lesson plans, usage statistics, and printable research logs for your students, you will find all the tools you need to support both your colleagues and your users here. Click any link on the left navigation of the Resources for Teachers/Librarians page to explore the many resources available to librarians and educators.




At Core Concepts: Periodic Table, we are committed to ensuring that our products are accessible to all users, including persons with disabilities.


Core Concepts: Periodic Table meets all level-one guidelines of Section 508 of the Rehabilitation Act. It is also designed to meet Priority 1 and 2 of the Web 3 Content Accessibility Guidelines 1.0. Compliance with each of these guidelines has also been documented and reviewed during the visual design build phase.


Core Concepts: Periodic Table also features accessiBe, an accessibility tool that helps make our site friendlier for users with disabilities. Users can adjust accessiBe’s settings to clear flashes, enhance visuals, reduce distractions, increase focus, and optimize for screen readers, among other features. For users with screen readers, the tool is enabled automatically. AccessiBe aims to adhere as strictly as possible to the World Wide Web Consortium’s (W3C) Web Content Accessibility Guidelines 2.1 (WCAG 2.1) at the AA level. You can check all the features by clicking on the icon in the lower right corner of the screen on any page. From there, you can explore all the tools that are available.

If you have trouble accessing or reading any part of this site, please contact us.


External Links and Resources


All recommended Web sites and organizations are annotated and reviewed by Rosen Digital’s team of editors, professionals experienced in creating content for students.


However, since Web content is constantly changing, the Rosen Publishing Group recommends that young users check with their parents or teachers before visiting any linked Web sites.


Recommended nonfiction books are based on careful assessment of the quality, accuracy, and currency of available age-appropriate titles, as well as suggestions from teachers and librarians.





The Core Concepts: Periodic Table homepage features an engaging, interactive periodic table. To reach the homepage from anywhere in the site, simply click the Core Concepts: Periodic Table logo on the upper left of any page.


Each article on Core Concepts: Periodic Table can be accessed from the homepage. Core Concepts: Periodic Table contains articles on each chemical element as well as articles on additional subjects like element groups, atomic theory, and Dmitry Mendeleyev, creator of the periodic table.


The homepage periodic table organizes all 118 elements by atomic number and chemical symbol. Users can preview basic information about an element by hovering over that element's square on the periodic table. Clicking an element's square will take the user to the article about that element. On mobile devices, clicking an element's square once will display basic information about that element. Clicking again will take the user to the article about that element.


On the homepage, the More About the Periodic Table button offers access to additional articles on topics like element groups, atomic theory, and Dmitry Mendeleyev. By clicking on the More About the Periodic Table button, users can see a full list of additional articles. Clicking an article title will take the user to the first section of that article.


Element Builder


Core Concepts: Periodic Table includes the Element Builder, an interactive activity that encourages students to explore atomic theory and the science behind the periodic table. The Element Builder features six focused activities that reinforce skills and strengthen understanding of periodic table organization and trends, radioactivity, and other topics. The Element Builder allows users to manipulate an interactive model of an atom by changing the number of subatomic particles while observing the effects of their changes in real time.


From the homepage, the Element Builder is accessed from the Element Builder button under the Core Concepts: Periodic Table logo. From any other page, the Element Builder is accessed from the Element Builder button in the left navigation panel.


Explore, Create, Learn


The Explore, Create, Learn page is a gateway to interactive resources, content creation tools, and study aids for students. It includes links to the following resources:

  • The Elements of the Periodic Table experience, an interactive, multimedia-rich tool for exploring the history of the periodic table, atomic structure, and the role of the elements in our world and our bodies. This experience is provided courtesy of and is copyrighted to The Open University.

  • Three interactive activities that guide students through the creation of unique user-generated content including: multimedia presentations, podcasts, and videos.

  • A video gallery that collects and categorizes video content from across Core Concepts: Periodic Table.

  • Digital flashcards available through Quizlet. These study aids can be used within any browser on a laptop, PC, or mobile device. Cards can also be experienced with Quizlet's iOS app, Quizlet's Android app, or a variety of free third-party flashcard apps for iOS and Android devices. Learn more at the Quizlet Help Center.

  • The Element Builder, an interactive activity that encourages students to explore atomic theory and the science behind the periodic table.


From the homepage, the Explore, Create, Learn page is accessed from the Explore, Create, Learn button under the Core Concepts: Periodic Table logo. From any other page, the Explore, Create, Learn page is accessed from the Explore, Create, Learn button in the left navigation panel.


Navigation and Search


Core Concepts: Periodic Table allows users to find articles by navigating the interactive homepage or by A-Z browse, text search, and media search.


Browse by A-Z


You can browse for topics using an alphabetical list. Simply click the A-Z button in the top navigational bar anywhere in the site. From the Browse A-Z page, select a letter at the top of the page to see topics that begin with that letter.


The A-Z browse displays all articles alphabetized by the article name. It also contains all key topics found within articles, alphabetized by the key topic name. The name of the article the key topic appears in is displayed in parenthesis after the key topic.




You can search for an article from any page using the search box in the top right corner. Simply type in your search term(s) and hit enter or click on the magnifying glass. This will produce two types of search results: Text search and media search. Text search results will appear on the left side of the page. Media search results (images and video files) will appear on the right side of the page.


If your search does not return any results, the site will try to suggest other search terms that will return better results for you. Your results page will display “Did you mean” with up to three choices of alternate searches. Click any of those terms to start a new search with the term. You can also click the link to browse subjects by the A-Z browse.


Text Search Results


Text search results appear on the left side of the page in a numeric list. The search term is highlighted in the search results. Users will view the title of an article, as well as content from the article that corresponds to the search term. Clicking on a title will take the user to the article section that contains the search term.


If no results are found, the site will suggest a possible alternative or direct the user to the A-Z browse.


Media Search Results


Media search results appear on the right side of the page. Users will view an image or video file that corresponds to the search term. Clicking on the item will take the user to the article section where the image or video file appears.




All articles are laid out in the same format to allow for easy reading and navigation. The left side of each page features buttons that allow you to print or email the article. The Cite button lets you generate citations using NoodleTools. You can also view the article citation in MLA (Modern Language Association), APA (American Psychological Association), or Chicago Manual of Style (16th edition) format. 


The article table of contents appears below these buttons. Click on any section in the table of contents to navigate to that section. You can also click on the Investigate section to read about topics related to the current article.


Many articles contain a Find Out More section with Web sites and recommended reading annotated and reviewed by Rosen editors. 


In the top right corner of each article are three helpful tools:


1. The Select Language drop-down menu allows you to instantly translate article text into over 100 languages.


2. The Share tool allows you to save and share articles with family and friends via Facebook or other services. With this feature, full articles can be viewed with no login required.


3. The Save button allows you to save the article to Google Drive.


Disclaimer: Core Concepts: Periodic Table offers a machine translation of selected content. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Rosen Publishing makes no representations or warranties with respect to these translations. 


At the bottom of each section, you can find the article citation in MLA, APA, or Chicago Manual of Style format.




All articles contain visual elements, including featured videos and images. To view an image in a larger format, click the “View Larger Image” link. A new window will open with a larger version of the image. This is especially useful for viewing images that contain labels. From this window, you can print the larger version of the image.




Core Concepts: Periodic Table contains more than 150 high-interest videos that bring the content to life and support visual learners. The videos are designed to work in all compatible browsers (see System Requirements above for details).


To play a video, click on it or select the play icon in the controls displayed along the bottom of the video player.


Click the “CC” button in the bottom right corner of the video player to view closed captions for the video. Click the “View Transcript” button below the video player to view a transcript of the video, and click the “Hide Transcript” button to close the transcript.




Core Concepts: Periodic Table is proud to offer text-to-speech by ReadSpeaker. Text-to-speech helps newer, challenged, or ESL readers by allowing them to “Listen” to article text as it is read aloud. ReadSpeaker works within all supported browsers.

Text-to-speech is accessible in two ways. First, by clicking the “Listen” button at the top of each article section. This opens a small audio player directly on the page, where you can “Listen” to the section text read aloud in either a male or female voice, pause or stop the audio, and adjust the audio speed and volume to your liking.

The player also includes a drop-down menu with access to even more settings, including controls over how text is highlighted as it is read, the ability to scroll pages automatically in synchronization with the text being read, a way to enlarge text as it is read so that it’s easier to see, a page mask that helps readers focus by dimming the browser window except for a resizable band surrounding the text being read, and more. And the menu’s Text Mode option lets you display article section text in a separate window free from distraction, while providing granular control over text characteristics such as type size, color, spacing, and font, including the ability to apply the Open Dyslexic font designed to mitigate some symptoms of dyslexia. Finally, the menu gives you the option to download an article section’s audio as an MP3 file directly to your device.

In addition, ReadSpeaker integrates with Google Translate to provide text-to-speech in 13 languages besides English. When you choose Arabic, Chinese, French, German, Greek, Hebrew, Italian, Japanese, Korean, Polish, Portuguese, Russian, or Spanish in the Select Language drop-down menu at the top-right of every article section and then click “Listen”, the player seamlessly reads the translated text as it appears on the page aloud.

The second way to activate text-to-speech is by selecting text in an article—either a word, sentence, or entire paragraph—and clicking “Listen” in the popup menu that appears. The popup menu also includes a dictionary for quick text definitions and the ability to translate selected text into multiple languages.

There’s a Help button in the ReadSpeaker drop-down menu, which includes topics that should answer any questions you have about the text-to-speech feature.

Note: In articles devoted to individual chemical elements, text-to-speech is not active on the first section of each article, but is available in all subsequent sections.

Text Translation


The text translation feature provided by Google Translate allows users to translate article text into more than 100 languages, including Arabic, Chinese, French, German, Greek, Hebrew, Italian, Japanese, Korean, Polish, Portuguese, Russian, and Spanish. Just select the language of your choice from the drop-down menu at the top of each article section.

Enhanced Text Visibility


Enhanced text visibility, a way to enlarge article text so that it’s easier to see, is available in ReadSpeaker, the text-to-speech feature available in all Core Concepts: Periodic Table articles. To turn on enhanced text visibility in an article, click the “Listen” button at the top of each article section, click the menu icon in the upper-left corner of the ReadSpeaker player, and select Enlarge Text.




In all articles, the Print button in the left navigation bar will open a new window that allows you to either print the current section of the article you are viewing or to print the entire article. Images and the article citation will be printed.


You can also print the current section by going to your browser’s File menu and selecting the Print option. If you have difficulty printing, please check your printer setup.




Click the Email button in the left navigation bar to email an article to yourself or someone else. When you click this button, a new window containing a form will open. You must enter your name, your email address, and the recipient’s email address. If you wish to send the article to yourself, put your own email address in the field for the recipient’s email address.


You may also enter an optional greeting/message to the recipient and attach images from the article to your email if you wish. The article citation will also be included in the email in MLA (Modern Language Association) format, APA (American Psychological Association) format, or Chicago Manual of Style (16th edition) format.


Email messages, in rare cases, may take up to an hour to be received after they are sent. If you have trouble receiving email sent from the site, please check your email junk mailbox or filter, or check the spelling of the email address to which you are sending.




Click the Cite button on the left navigation bar to use the NoodleTools citation generator. You can also see the article citation in MLA (Modern Language Association) format, APA (American Psychological Association) format, or Chicago Manual of Style (16th edition) format.




Many articles include a glossary that features key terms found in that article. To view the glossary for an article, click the Glossary link that appears in that article’s table of contents in the left navigation bar. To view key terms within an article, place your cursor on the bold text.


The article glossaries have been custom-created by Rosen editors to be age-appropriate and relevant to science content for students.


Usage Statistics


You can view your account information and usage statistics from throughout the site. First, log into the site as a subscriber. Then click the link to Resources for Teachers/Librarians in the left navigation bar. From the Resources for Teachers/Librarians page, click the link to Usage Statistics in the left navigation bar. Then simply log in with your administrative username and password to access your account information and usage statistics.


Contact Us


If you need further site help, you can contact the Core Concepts: Periodic Table support team in several ways.


Contact us via email.


Contact us toll-free by phone at (877) 381-6649.


Contact us by mail at:
Core Concepts: Periodic Table
Rosen Publishing
29 East 21 Street
New York, NY 10010