How much mercury in a mercury manometer?

Scientists do not yet know if Mercury has the element Mercury in it, they need further studies. AKA they have to get more "inside" of Mercury.

Both the planet Mercury and the chemical mercury - also written as Hg - are named after the Roman god Mercury (latin: Mercurius), known for speed and mobility. The chemical is only named after the...

There is no mercury in Mercury. Atmospheric Composition of Mercury: 42% Molecular oxygen 29.0% sodium 22.0% hydrogen 6.0% helium 0.5% potassium Trace amounts of argon, nitrogen, carbon...

none its an element.

none