The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

For example, the atomic number of chlorine is 17. Every chlorine atom has 17 protons and 17 electrons. It has 17 positive charges and 17 negative charges, meaning that it is neutral overall. Atoms of ...

The revelation that electrons in the single-atom-thick material known as graphene can act much like a frictionless fluid is a ...

Can scientists image the motion of electrons inside atoms? It's a challenging problem, but solving it would help us develop a more complete understanding of things like chemical reactions and the ...

A single-electron transistor with a central component -- an island only 1.5 nanometers in diameter -- that operates with the addition of only one or two electrons has been developed. The transistor, ...