The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to Dmitri Mendeleev and Lothar Meyer and the ...

The periodic system encodes order and similarity among chemical elements arising from known substances at a given time that constitute the chemical space. Although the system has incorporated new ...

"This video explores the electronic structure of an atom. Electrons are arranged in energy levels or shells around the nucleus, and each shell can hold a maximum number of electrons. Using the ...

Think of it, however, from the viewpoint of children sitting at their desks looking for the first time at Mendeleev’s table hanging on the classroom wall. The teacher rarely mentions any of the ...

This illustration shows a typewriter with the keys depicted as the periodic table. Hands are typing on it, and the sheet of paper coming out of it shows the words "Tales from the table." Credit: Chris ...