Chemical symbols are the abbreviations used in chemistry for chemical elements, functional groups and chemical compounds. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised. In Chinese, each chemical element has a dedicated character, usually created for the purpose …

A chemical hazard symbol is a pictogram applied to containers of dangerous chemical compounds to indicate the specific hazard, and thus the required precautions. There are several systems of labels, depending on the purpose, such as on the container for end-use, or on a vehicle during transportation.

Term symbols with LS coupling. For light atoms, the spin–orbit interaction (or coupling) is small so that the total orbital angular momentum L and total spin S are good quantum numbers.The interaction between L and S is known as LS coupling, Russell–Saunders coupling (named after Henry Norris Russell and Frederick Albert Saunders, who described this in 1925) or spin-orbit …

The calorie is a unit of energy. For historical reasons, two main definitions of "calorie" are in wide use. The large calorie, food calorie, or kilogram calorie was originally defined as the amount of heat needed to raise the temperature of one kilogram of water by one degree Celsius (or one kelvin). The small calorie or gram calorie was defined as the amount of heat needed to cause …

Changwon (Korean pronunciation: [tɕʰaŋ.wʌn]) is the capital city of Gyeongsangnam-do, on the southeast coast of South Korea.With a population of 1.07 million as of 2015, Changwon is South Korea's ninth-most populous city.. A port city, Changwon is bordered by Masan Bay to the south, and the cities of Busan and Gimhae to the east. The city of Miryang lies to the northeast, and …

Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity, the …

The Terracotta Army is a collection of terracotta sculptures depicting the armies of Qin Shi Huang, the first Emperor of China.It is a form of funerary art buried with the emperor in 210–209 BCE with the purpose of protecting the emperor in his afterlife.. The figures, dating from approximately the late third century BCE, were discovered in 1974 by local farmers in Lintong …

The simplified molecular-input line-entry system (SMILES) is a specification in the form of a line notation for describing the structure of chemical species using short ASCII strings.SMILES strings can be imported by most molecule editors for conversion back into two-dimensional drawings or three-dimensional models of the molecules.. The original SMILES specification was initiated in …

In chemistry, the standard state of a material (pure substance, mixture or solution) is a reference point used to calculate its properties under different conditions.A superscript circle ° (degree symbol) or a Plimsoll (⦵) character is used to designate a thermodynamic quantity in the standard state, such as change in enthalpy (ΔH°), change in entropy (ΔS°), or change in Gibbs …

The South Korean won, officially the Korean Republic won (Symbol: ₩; Code: KRW; Korean: 대한민국 원) is the official currency of South Korea.A single won is divided into 100 jeon, the monetary subunit. The jeon is no longer used for everyday transactions, and it appears only in foreign exchange rates.