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Hg is the modern chemical symbol for mercury. [28] It is an abbreviation of hydrargyrum , a romanized form of the ancient Greek name for mercury, ὑδράργυρος ( hydrargyros ). Hydrargyros is a Greek compound word meaning ' water-silver ' , from ὑδρ - ( hydr -), the root of ὕδωρ ( hydor ) ' water ' , and ἄργυρος ...
Inch of mercury (inHg and ″Hg) is a non-SI unit of measurement for pressure. It is used for barometric pressure in weather reports , refrigeration and aviation in the United States . It is the pressure exerted by a column of mercury 1 inch (25.4 mm) in height at the standard acceleration of gravity .
Hg is the symbol of chemical element mercury (from its Latin name hydrargyrum). Hg, hg, HG, inHg or "Hg may also refer to: Arts and media. H. G. Wells, English writer;
Hg is the modern chemical symbol for mercury. It comes from hydrargyrum , a Latinized form of the Greek word Ύδραργυρος ( hydrargyros ), which is a compound word meaning "water-silver" (hydr- = water, argyros = silver) — since it is liquid like water and shiny like silver.
For some elements, this is because the material was known in ancient times, while for others, the name is a more recent invention. For example, Pb is the symbol for lead (plumbum in Latin); Hg is the symbol for mercury (hydrargyrum in Greek); and He is the symbol for helium (a Neo-Latin name) because helium was not known in ancient Roman times.
Hyperemesis gravidarum (HG) is a pregnancy complication that is characterized by severe nausea, vomiting, weight loss, and possibly dehydration. [1] Feeling faint may also occur. [ 2 ] It is considered a more severe form of morning sickness . [ 2 ]
The density 13 595.1 kg/m 3 chosen for this definition is the approximate density of mercury at 0 °C (32 °F), and 9.806 65 m/s 2 is standard gravity. The use of an actual column of mercury to measure pressure normally requires correction for the density of mercury at the actual temperature and the sometimes significant variation of gravity ...
199 Hg and 201 Hg are the most often studied NMR-active nuclei, having spin quantum numbers of 1/2 and 3/2 respectively. All isotopes of mercury are either radioactive or observationally stable , meaning that they are predicted to be radioactive but no actual decay has been observed.