Give each student a copy of the periodic table of the elements, the periodic table of elements 1–20, and the activity sheet. Students will use the periodic table of elements 1–20, along with the ...

The image you project contains all of the electrons for elements 1–20. However, the periodic table on the activity sheet contains electrons only for the elements at the beginning and end of each ...

You may remember the periodic table of the elements as a dreary chart on your classroom wall. If so, you never guessed its real purpose: It’s a giant cheat sheet. We have 10 things you didn’t know ...

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site, we ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in.

Take the numbers in order from the code sheet and match them to the atomic symbols (one- or two-letter abbreviations) on the filled-in periodic table. Do that, and you’ll get a sentence (after ...

Let’s take a tour of some of the most extreme substances on the periodic table. Densest: Osmium Element No. 76 is the heavyweight champion of Earth’s natural materials.

The periodic table of elements, or Mendeleev’s table, was created in 1869 by Russian chemist Dmitri Mendeleev. This table organizes all known chemical elements by their atomic number, or the ...

An alternative periodic table of elements focusing on highly charged ions reveals new science that could support the quest for more accurate optical atomic clocks ...

The first version of Mendeleev’s periodic table, published in 1869, was reportedly completed in just one day. Historians have pieced together what happened during that day.