Helium has one kind of atom: helium.
Helium-3 is used in experiments for nuclear fusion, neutron detection, cryogeny installations and RMN for medical use.
None, theoretically
Helium is no metal, but a gas (at room temperature at least).
nuclear fusion of hydrogen to form helium
nonmetal
Uses of helium: balloons, lasers, protective atmosphere, welding, leak detection, MRI, filling gas in nuclear fuels, physics experiments, etc.
Heike Kamerlingh Onnes, who discovered and named the phenomenon during his experiments with liquid helium
Most experiments conducted are medical experiments, but fluid mechanics experiments, various experiments involving weightlessness, and testing of new technologies are also conducted.
Facesheets
helium and uranium.
Elements