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

it became incorporated into iron’s atomic lattice, forming compounds designated as FeHex (where x represents the helium content). The presence of helium expanded the iron’s crystal structure ...

For example hydrogen has the atomic number of one, helium two, lithium three etc. The first energy level (the one nearest the nucleus) can hold a maximum of 2 electrons with the others being able ...