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 ...

Predictive power. Gallium. Mendeleev left blank spaces in his original periodic table so that he could properly line up the known elements. Gallium, element 31, was his first gap to be filled, in ...

There are another 27 elements on the periodic table after uranium that were not created by stars. ... electron, and a charge-less, nearly massless, antineutrino.

A new version of the periodic table arranges elements by protons instead of electrons. ... and so forth. Overall, the numbers representing full-up electron shells are 2, 10, 18, 36, 54, and 86.

With the discoveries now confirmed, "The 7th period of the periodic table of elements is complete," according to the International Union of Pure and Applied Chemistry.

A staple in every science classroom is the periodic table of elements, ... and argon, rarely react with other elements. Their most stable electron numbers are 2, 10, 18, 36, and so on." ...

Four new elements are about to be added to the periodic table: nihonium (Nh, element 113), moscovium (Mc, element 115), tennessine (Ts, element 117), and oganesson (Og, element 118). When you say ...

Time to re-write the textbooks. The International Union of Pure and Applied Chemistry (IUPAC) has confirmed the existence of four new elements with the atomic numbers 113, 115, 117, and 118.

In their momentary life span, atoms of lawrencium, element 103, may have left a lasting impression on the structure of the periodic table. For the first time, researchers have measured a basic ...