Elements

Elements are the smallest units of matter that can’t be divided using chemical means. They are the building blocks of matter. Learn the names of the elements and get facts about them.

When the elements were discovered (periodic table). — This periodic table chronicles the discovery of the chemical elements. The date is given for when an element was first isolated in pure or nearly pure form. In some cases, the existence of an element was suspected or predicted several years or even thousands of years before its purification. You […]

When Were the Elements Discovered? Timeline and Periodic Table Recently updated !

This entry was posted on October 11, 2018 by Anne Helmenstine (updated on October 11, 2018)

Electron Levels of a Palladium Atom — This is a collection of the electron shell diagrams of all 118 elements. Each element’s atom is shown with the number of protons in the nucleus with shells of electrons filled by energy levels. The lowest energy level is closest to the nucleus. The numbers appearing under the element names […]

Electron Shell Diagrams of the 118 Elements

This entry was posted on August 30, 2018 by Todd Helmenstine (updated on October 2, 2018)

Nonmetals Word Search — Wordsearches are a fun method to introduce glossary terms to students. This nonmetals word search contains 18 nonmetal elements from the periodic table. The nonmetals can be found vertically, horizontally, and diagonally as well as forwards and backward. The wordsearch is optimized to fit on a standard 8.5″ x 11″ […]

Nonmetals Word Search Puzzle

This entry was posted on August 24, 2018 by Todd Helmenstine (updated on August 24, 2018)

Elements found in nature — There are 118 elements on the periodic table, but how many of these elements can be found in nature? Some of the elements on the periodic table are strictly man-made and do not exist in nature. A few elements exist naturally but are found only in trace amounts. This table […]

What are the Naturally Occurring Elements? – Elements Found In ...

This entry was posted on June 12, 2018 by Todd Helmenstine (updated on June 28, 2018)

Abundance of Elements Earth Crust Periodic Table — Earth’s crust contains nearly all of the naturally occurring elements. This table and periodic table shows the relative abundance of elements in the Earth’s crust. Each element is represented by its atomic number, symbol, name, and abundance in milligrams per kilogram of Earth’s crust. Since 1 milligram is one-millionth of […]

Abundance of Elements in Earth’s Crust – Periodic Table and ...

This entry was posted on May 23, 2018 by Todd Helmenstine

Seawater Element Abundance — Earth’s oceans cover 71% of the surface of the planet. Even a casual inspection will tell you there is more to seawater than just water. You would expect the two most common elements to be water itself, hydrogen and oxygen. What else is found in Earth’s oceans? These tables answer […]

Abundance of Elements in Earth’s Oceans – Periodic Table and ...

This entry was posted on May 20, 2018 by Todd Helmenstine (updated on May 26, 2018)