Mercury's symbol Hg is derived from its Greek name, hydrargyrum, which means "liquid silver" in reference to its gleaming surface. Because of its speed, the element is sometimes known as "quicksilver."
HG is used as a shorthand way of writing hydrogen gas. This occurs when there are multiple gases present together at standard temperature and pressure; they then be listed in order of relative abundance: hydrogen first, then helium. The term hydrogen gas is thus used interchangeably with molecular hydrogen or simply H2.
Hydrogen is the lightest atom, being one-third the weight of oxygen. It is a colorless, odorless, nonpoisonous diatomic gas that is produced by electrical discharges through air, water, and other substances. It is also found in many chemicals, such as ammonia (NH3), acids, bleach, rocket fuel, and synthetic fibers. In fact, it is the most common element in the universe after hydrogen itself.
Helium is the second lightest atom, being only one-fifth the weight of oxygen. It is a colorless, odorless, inert noble gas that is an essential component of air. It is the most abundant element in the universe after hydrogen. Helium atoms cannot be divided and therefore never disappear from existence; they are forever trapped inside planets, stars, and other stellar bodies.
The current chemical symbol for mercury is Hg. It is derived from hydrargyrum, a Latinized version of the Greek term udrarguros (hydrargyros), a compound word that means "water-silver" (from udr-hydr-, the root of udor, "water," and arguros argyros, "silver") because it is liquid like water and shining like silver. The h is silent but important to keep in mind when spelling words containing it.
Hg is the most abundant metal on Earth. It is used in many products created by humans; for example, thermometers, barometers, and spark plugs contain Hg. However other elements such as arsenic, cadmium, or lead can be found in greater amounts. Hg has one electron in its outer shell which makes it a metallic element. Its atoms have a high melting point (more than 200 °C) and are soft (like those of carbon). That's why Hg does not exist alone but only in compounds. It is part of organic molecules such as ethylmercury, dimethylmercury, and phenylmercury. In addition, Hg has a tendency to move from its original location to other parts of the body through food consumption and environmental exposure. This becomes a problem because Hg is toxic to living organisms.
People have been using Hg since ancient times for various purposes including material for lamps and pipes. In 1772, Georg Simon Bessel developed the first accurate method for extracting Hg from minerals.
Mercury (Hg), popularly known as quicksilver, is a chemical element and a liquid metal in Periodic Group 12 (IIb, or zinc group). It is the most dense of the noble gases, at 19.566 g/cm3. Its atomic number is 80; its weight is 200.869318 grams; its symbol is Hg.
It is a silvery-white metal that tends to accumulate heat when exposed to air or light. When heated, it will evaporate, becoming toxic if inhaled. Mercury has a slight electrical conductivity and is used in thermometers, barometers, and aneroids. It is also useful in dental fillings and coatings on optical instruments because it is anti-reflective.
Human activity has caused mercury contamination in the environment. The main sources of mercury pollution are coal-fired power plants, municipal waste dumps, and unregulated gold mining operations. Exposure to mercury can lead to brain damage, heart disease, cancer, and death.
People have used mercury for many purposes since ancient times. It was originally found in nature as a mineral form called cinnabar. Red cinnabar contains more than 95% mercury while white mercury usually contains small amounts of other elements such as arsenic, sulfur, and oxygen.
Mercury seems beautiful in its gleaming, fast-moving liquid state, but don't touch it! It has the potential to be exceedingly harmful to humans. Although mercury is a metal, it also has a pungent odor and a green color when exposed to air.
In chemistry, mercury is a chemical element with a silvery-white appearance and a soft, silver-like metallic taste. It is a heavy metal that is highly toxic if not handled properly. In fact, it is so toxic that any amount of mercury exposure can cause health problems. The human body cannot store mercury, so it gets rid of it by releasing it into the environment through urine and feces. Even small amounts of exposure can lead to serious health issues over time.
There are three main types of mercury used in science labs: elemental mercury, organic mercury, and inorganic mercury. Elemental mercury is the purest form of mercury and is usually in a liquid state at room temperature. It will react with oxygen or water to form a gas or a weakly bound solution, respectively. Organic mercury is found in certain chemicals that contain mercury molecules joined together. Inorganic mercury is absorbed by soil or converted into organic forms when inhaled or ingested.
Mercury is a highly poisonous element. It is absorbed through the skin and enters the body through the bloodstream. The only way to remove it from the body is via the urine or feces.
Because of its size, mercury has an enormous influence on the behavior of elements around it. Its effect is usually negative, making other elements in the planet more reactive than they would otherwise be. For example, mercury tends to reduce the stability of atoms so that they are more likely to break down into simpler pieces. This often leads to elements being found in the earth's crust in a combined state - for example, gold is found together with mercury because they react with each other under these conditions. However, mercury also has a counteracting effect on some elements. It can make them more stable, so that they are less likely to combine with other elements. In fact, some compounds of mercury are very stable - for example, mercuric oxide is very resistant to oxidation-which means it does not decompose even when exposed to air for many years.
The presence of mercury has been detected in several planets outside our solar system, including Mars, Earth's moon, and Pluto.
Mercury is one of the seven alchemical metals (gold, silver, mercury, copper, lead, iron, tin). In astrology, the symbol for mercury might also be used to symbolize the planet of the same name. A serpent or snake is frequently used to represent metal. When the metal is gold, it is usually represented by an image of a golden snake.
In mythology, mercury is the messenger between gods and humans. It is often taken to mean that something valuable and important is about to be delivered. The Greek word for mercury is Hermes. In English, mercury means "the element mercury", originally from Latin mercurius, which comes from Greek Merkourion, which comes from Hebrew Mereqorim, which comes from Arabic Marakiz.
The earliest reference to mercury we know of was around 3000 B.C. when it was used by the Egyptians to coat their swords and spears. They called this substance "the red god" because of its red color. Around 1500 B.ersdorf gold was used instead but mercury continued to be employed as a metal tool.
The idea of using mercury in alchemy comes from the fact that all metals are composed of different elements that have different properties. For example, gold is made up of 75% gold and 25% other elements. By separating out the elements from one another, you can use them again for other purposes.