You can swallow the liquid form of elemental mercury without much fear because it doesn't easily penetrate the lining of the stomach and intestines. (discovermagazine.com)
A slowly increasing number of experimental, field and modeling studies has suggested that plant leaves can also directly take up gaseous elemental mercury from the atmosphere. (en.ilmatieteenlaitos.fi)
The reason is that approximately 50 % of a dental amalgam is toxic elemental mercury by weight. (thehealthyhomeeconomist.com)