Entangled electrons Illustration depicting an atom (green nucleus with a white electron cloud) that is hit by a laser pulse (red). One electron is ripped out of the atom (black sphere on the right) ...

The remaining electron then behaves as if it were orbiting a nucleus with just one positive charge, just like the electron in a hydrogen atom. The difference is that the nucleus is 4.1 times ...

An atom is composed of two parts: a nucleus and an electron cloud. The nucleus is in the heart of an atom and composed of positive particles called protons and neutral particles called neutrons.

One way to obliterate an atom is to shoot it with the planet's most powerful X-ray gun. Linda Young tried that experiment in October 2009, when she was testing the newly opened X-ray free-electron ...

Well, helium is the first “noble gas” on the periodic table—the first atom with enough electrons to completely fill the available slots in its electron shell.

An atom is composed of two parts: a nucleus and an electron cloud. The nucleus is in the heart of an atom and composed of positive particles called protons and neutral particles called neutrons.