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...