Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic ...

118 Elements and Their Symbols and Atomic Numbers: The periodic table is a well-organized chart that contains all the known elements in the universe. These elements are building blocks of matter ...

You may use table navigation commands for the screen reader of your choice. The Periodic Table of Elements. Each entry contains the atomic number, chemical symbol, and atomic mass to two decimal ...

The study shows that the new method is a promising step forward for embarking on the mission to produce element 120, which ...

Advancements in nuclear physics suggest the possibility of discovering stable, superheavy elements. Researchers have found an ...

The periodic table was arranged by atomic mass, and this nearly always gives the same order as the atomic number. However, there were some exceptions (like iodine and tellurium, see above), which didn ...

The search for new elements comes from the dream of finding a variant that is sufficiently stable to be long-lived and not ...

Going down group 1, the melting point decreases. Lithium, Li Fizzes steadily; slowly becomes smaller until it disappears Sodium, Na Fizzes rapidly; melts to form a ball; quickly becomes smaller ...

These are almost one-quarter of the periodic table and are mainly found in the first four periods. Of these, 11 are essential elements that our bodies need in larger amounts: oxygen, carbon ...

It was Dmitri Mendeleev - the father of the periodic table - who first theorized that there might be an undiscovered alkali metal lurking somewhere in the universe with an atomic number of 87.