If you convert the entirety of a hydrogen atom into energy, you get 1.5 x 10 -10 Joules, That looks like a very small number, and it is; but gamma radiation is usually bad for you, right?

Because the physics of a hydrogen atom is so well defined, it's possible to use these precise measures of how it absorbs and emits light to generate measures of the atom's components. These ...

Proton size puzzle: Surprisingly small proton radius confirmed with laser spectroscopy of exotic hydrogen Date: January 24, 2013 Source: Paul Scherrer Institut (PSI) Summary: An international team ...

Measurement in ordinary hydrogen agrees with a surprising 2010 result on the element's exotic cousin — but gives a smaller value than virtually every other experiment.

This would require a super-stable observatory whose optical components move or distort no more than 12 picometers, a measurement that is about one-tenth the size of a hydrogen atom. To date, NASA has ...

Not to be confused with a covalent bond. The AFIR predictions and the mechanistic significance of hydrogen bonding were experimentally validated with >10:1 ratios for selective O–H bond cleavage.