The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

Nature Chemistry - The story of the last element to be discovered out of the first 92 catalogued in the periodic table is told by Eric Scerri, who reminds us that technetium can be found a little ...

The periodic table looks complete ... The resulting superheavy atom pops out the back of the target, which is as thin as foil. Another constraint is time. As elements get heavier, they generally ...

Ivan Dmochowski ponders how xenon, though initially slow to earn a spot in the periodic table, is now at the forefront of advances in science and technology. For all their nobility, elements of ...

How do we calculate mass and atomic numbers? VideoHow do we calculate mass and atomic numbers? This video is an interactive lesson in calculating an atom's mass and atomic number.

Eleven non-metals are gases at room temperature, including oxygen and chlorine. One non-metal, bromine, is a liquid at room temperature. The other non-metals are solids at room temperature ...

We present a general method for solving the modified Helmholtz equation without shape approximation for an arbitrary periodic charge distribution, whose solution is known as the Yukawa potential or ...

Examples abound of rings that feature multiple nitrogen atoms—the lightest of the pnictogen elements. There are triazoles, which snap together in the classic, copper-catalyzed click chemistry ...

February is the shortest month of the year, but there are a ton of things to celebrate and acknowledge during these 28 days.

The magazine has three golden rules: never write about writers, editors, or the magazine. On the occasion of our hundredth ...