Researchers have taken atomic diffraction to a new level, revealing surprising behaviors in high-energy helium and hydrogen ...

The atom is neutral as it has two positive protons and two negative electrons. A helium atom that has lost or gained an electron is an ion. The ion has two positive protons but one electron so it ...

A helium atom has two electrons in an energy level outside the nucleus. The atom is neutral as it has two positive protons and two negative electrons. A helium atom that has lost or gained an ...

For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass, it seemed that something besides the protons in the nucleus ...

The two Nasa astronauts have been marooned at the International Space Station since June last year after multiple helium leaks incapacitated the thruster systems of their spacecraft – Boeing’s ...

While protons and neutrons are well-known and stable constituents of an atom, hyperons are unstable and are made up of either one or more quarks. Spotted in cosmic rays more than seven decades ago ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed. Primordial helium from the ...

Helium is notoriously hard to contain because, like hydrogen, it is a tiny little atom even by atomic standards. It also expands about 750 times when it turns into a gas, according to the post’s ...

By creating a high-density helium plasma environment, researchers achieved controlled implantation of ... Thermal desorption spectroscopy (TDS) was used to measure He atom implantation efficiency, and ...