Quiz

[oblongata]

What device is used to measure time using excited pyramid shaped molecules of hydrogen and nitrogen.

Tks

Obo

[beermagnet]

An Ammonia (NH3) molecule is a pyramid shape, and there is an atomic clock based on the vibrationally excited energy levels of ammonia called an
Ammonia Clock
So I think that's the "device" you're after.

[oblongata]

Sounds good to me

many thanks

Obo