This electron arrangement can be written as 2.8.1 (each dot separates one shell from the next). This electron arrangement can also be shown as a diagram. In these diagrams: each shell is modelled as a ...

In the wee hours of the late 17th century, Isaac Newton could be found locked up in his laboratory prodding the secrets of nature. Giant plumes of green smoke poured from cauldrons of all shapes and ...

The news broke that a railroad car, loaded with pure sodium, had just derailed and was spilling its contents. A television reporter called me for an explanation of why firefighters were not allowed to ...