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 ...

or defects in a metal's atomic structure. The study discovered that by adding iron silicate to the vacuum vessel, helium ...