H2O. An almost negligible proportion of a few per million consists of "heavy water," in which the hydrogen atoms (H) are ...

699), Prof. Collie and Mr. Patterson have directed attention to numerous approximate coincidences between lines of neon and hydrogen, from which it is presumably intended to be inferred that ...

In the primordial darkness, after the Big Bang, nothing drifted but a vast sea of hydrogen and helium. It wasn't until stars came along, born from crushing densities in that clumping gas, that heavier ...

MANY examples of changes in ultra-violet absorption spectra attributable to hydrogen bonding have been reported and summarized by Ito 1. However, in few of these cases has the change in ...

Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light.