Helium (He) - Physical & Chemical Properties, Uses, Isotopes

1 three of the known wavelengths of the emission spectrum of helium are 4026 nm 4471 nm and 5875 nm he403 1 using equation 1 calculate nzfor these three lines 1 4026 nm n2 1 4471 nm n2 1 587 65793

What is Helium?

The world's helium supplies are running dangerously low – Here's why

Guy uses helium balloons to ditch his stash during a traffic stop.