The orbitals are filled in a specific order, starting with the lowest energy orbital and working up.Įach element in the periodic table presents its own unique emission spectra, which is determined by the energy levels of its electrons. In the electron configuration notation, the letters "s", "p", "d", and "f" represent the different types of atomic orbitals, and the superscripts indicate the number of electrons in each orbital. The electron configuration of an element describes the arrangement of electrons in the atoms of that element, and be used to predict its chemical properties and reactivity. Early precision barometers also contained this liquid, but they are rarely used today. It was gradually discontinued when its toxicity was discovered. Until the early 18th century, mercury was used in tablets to treat some common ailments. Its compounds are used to prepare strong red paints. Mercury is used in some batteries, some thermometers and in low-energy compact fluorescent light bulbs (CFLs). As a result, the use of this metal is carefully monitored. This metal is very poisonous: it can damage organs and nerves if inhaled or ingested. ![]() It was later known as mercury because of how fast it flowed as a liquid stream. This red mineral has been used for many centuries: the ancient Romans roasted cinnabar to release a liquid which they called hydrargyrus, meaning “ silver water“, alluding to the mercury obtained. ![]() Pure mercury forms around volcanoes where heat separates it from its minerals, such as cinnabar, (mercury sulfide, HgS). Moreover, along with water, it is one of the few liquids found naturally on the Earth’s surface. Mercury is the only metal found in a liquid state at room temperature.
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